in the accompanying image, a nucleotide is indicated by the letter _____.
Answers
In the accompanying image, a nucleotide is indicated by the letter B in the double stranded DNA structure.
Nucleotide refers to the molecule consisting of a nitrogen containing base, a phosphate group, and a sugar. The nitrogenous bases are adenine, guanine, cytosine and thymine in DNA (deoxyribose nucleic acid) molecule. In RNA (ribonucleic acid), thymine is replaced with uracil. These molecule pair together according to Chargaff's rule. Nucleotides are considered as the building block of DNA and RNA. They are responsible for functions such as the cell signaling, metabolism, and enzyme reactions. Nucleotides are synthesized from small molecules and amino acids and carry huge importance in nucleobases and nucleosides.
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Check all the attributes that apply to microbial taxonomy: Check AII That Apply a) Can use characteristics such as morphology; pigmentation, presencelabsence of specific genes; evolutionary relatedness b)Brings order to wide diversity of microbial life forms c)Only used for microbes of pathogenic or industrial significance d)Includes the naming of taxonomic groups in agreement with published rules
Answers
The attributes that apply to microbial taxonomy can use characteristics such as morphology; pigmentation, presence absence of specific genes; evolutionary relatedness. The correct answer is A.
What is TaxonomyTaxonomy is the phrases nomenclature, identification, and classification are all used to refer to the science of classifying living things.
Organisms are grouped into taxa based on their similarities to one another (s., taxon).
Before it is published in the International Journal of Systematic and Evolutionary Microbiology, a new species cannot be recognized.
Each organism has two names in taxonomy.
E. coli is one instance (E.coli). Both Escherichia and coli are names of species.
Thus, we may state that the attributes that apply to microbial taxonomy can use characteristics such morphology, coloring, the presence or absence of a certain gene, or an evolutionary link. Includes categorizing taxonomic groups according to predetermined rules.
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a phylogenetic tree showing the relationships among ten phyla of bilaterian animals is shown below.
Answers
The members of the phylum are coelomates (C), pseudocoelomates (P), or acoelomates (A) hence the labeling is as follows A, P, C, C, C, C, P, C, C, C.
A phylogenetic tree is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based on similarities and differences in their physical or genetic characteristics. All life on Earth is part of a single phylogenetic tree, indicating common ancestry. As dynamic hypotheses of genealogy and character change, phylogenetic trees can be used both to describe and understand character evolution and, as devices, to predict what we do not yet know.
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genetic tests of humans around the world show that the greatest genetic variation among humans is present in africa. why is that? group of answer choices
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Genetic tests of humans show that the greatest genetic variation among humans is present in Africa because, humans originated in Africa and then spread around the world in a series of migratory population bottlenecks. Or in group answer choice is A.
Is Africa the most genetically diverse?Africa, the foremost genetically diverse landmass, is where cutting edge people, Homo sapiens, started. Populaces on other landmasses are plummeted from bunches that moved out of Africa numerous tens of thousands of a long time back. Too African populaces appear solid designs of nonrandom mating. Various relocations to Africa all through early human history have expanded hereditary differing qualities there..Anatomically present day people likely originated in Africa, experiencing populace bottlenecks as a few cleared out to colonize the rest of the world. Since these occasions are decently later, as a result of broad quality stream inside major human populaces, most hereditary variety can be found inside major human populaces.Learn about genetic variation here: brainly.com/question/848479
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I need help now.
What is the group of a periodic table? please help me.
Answers
Answer:
In the periodic table, a group (also known as a family) is a vertical column of elements that share common characteristics. The elements in each group have similar chemical properties because they have the same number of valence electrons (the electrons in the outermost energy level of an atom). The number of valence electrons determines the element's reactivity and its ability to form chemical bonds. There are 18 main groups in the periodic table, and they are numbered from 1 to 18. The elements in Group 1 are known as the alkali metals, while the elements in Group 2 are known as the alkaline earth metals. The elements in Groups 3 through 12 are known as the transition metals, while the elements in Groups 13 through 18 are known as the post-transition metals. The elements in each group are listed in order of increasing atomic number.
a bird species is known for its unusual mating behavior. not much is known about the cause of this behavior. what could you study to better understand the proximate basis of this behavior? (check all that apply)
Answers
One bird species is well recognized for its peculiar mating habits. The reason behind this behavior is not well understood.
What are some illustrations of mating behaviors?When two animals only mate with one another in a monogamous relationship (1 partner)
Polygamy is the practice of animals having many mating partners. One guy mating with several females is called polygyny. When a female mates with several males, this is called polyandry.
Do people have mate-finding behavior?It is a fundamental aspect of human nature and could be connected to the sex desire. The social and cultural methods by which individuals may interact with one another to determine compatibility, the courtship phase, and the process of developing a personal bond are all included in the human mating process.
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thinking of the b cell and t cell activation and expansion processes. describe 3 common points and 5 difference between the two processes. (0.5 pt each)
Answers
There are millions of these alleles, yet each B or T cell can only detect one antigen per cell. Only activated B and T cells will continue to divide, creating a powerful reservoir of lymphocytes that are specialized to particular pathogens.
In the bone marrow, both types of cells are produced. While T cells travel to the thymus and develop there, B cells develop in the bone marrow. Antigens bind to receptors on the cell surface of B lymphocytes, activating them and causing them to divide and proliferate. MHC class ll molecules, which are expressed on the surface of antigen-presenting cells, present peptide antigens to hyper T cells, activating them.
Antibodies produced and secreted by B cells stimulate the immune system to attack invaders. The primary distinction between T cells and B cells is that whereas B cells can detect the surface antigens of bacteria and viruses, T cells can only recognize viral antigens that are present outside of infected cells.
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The diagram below shows plant cells submerged in solutions with different concentrations of sugar.
plant cell osmosis
In diagram 1, water is flowing by osmosis out of the cell because the concentration of water
A.
inside the cell is lower than in the surrounding solution.
B.
forces waste products to leave the cell.
C.
is the same both inside and outside the cell.
D.
inside the cell is higher than in the surrounding solution.
Answers
The Correct answer is C) is the same both inside and outside the cell.
What is plant cell osmosis?The protoplasmic membrane is semipermeable in plant cells yet the cell wall is permeable. Solvent travels from a concentrated solution to a dilute solution when a membrane is used to separate concentrated and diluted solutions or solutions of different densities from one another. The word "osmosis" refers to this procedure.The chemical potential of water, which serves as the catalyst for water flow in plants, is determined by these two elements.Water flows from an area with a high chemical potential to one with a low chemical potential.Water potential, or chemical potential of water, refers to the free energy present in water.To Learn more about plant cell osmosis refer to:
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the earliest fossil to show primate-like features, purgatorius, was identified by: a) its primate-like dentition b) forward-facing eyes c) large brain size d) possession of nails, not claws on its digits (fingers and toes)
Answers
Purgatorius, the earliest known primate, is solely known from isolated teeth and jaw fragments and dates back 65 million years.
Where was the earliest fossilized very early primate found?Palaeontologists have discovered the earliest primate skeleton ever discovered, which belonged to an animal that lived among trees 55 million years ago in what is now central China. A team lead by Ni Xijun from Beijing's Institute of Vertebrate Paleontology and Paleoanthropology found its fossil there.
How did Purgatorius get his name?Researchers now have a clearer idea of how Purgatorius lived thanks to the identification of ankle bones that were discovered in the same location as the teeth. Chester claims that only modern primates and closely related species have the diagnostic mobility traits found in the ankle bones.
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What forces the blood to circulate through vessels in a closed circulatory system?
a.
the notochord
b.
the nerve cord
c.
the cranium
d.
the heart
Answers
The heart forces the blood to circulate through vessels in a closed
circulatory system.
What is circulatory system?
The circulatory system is a network of organs and vessels that transport blood, oxygen, and nutrients throughout the body. It includes the heart, blood vessels, and the lymphatic system. The circulatory system is responsible for delivering oxygen and nutrients to cells throughout the body, as well as removing waste materials.
What is the Heart?
The heart is a muscular organ responsible for the circulation of blood throughout the body. It is responsible for delivering oxygen and nutrients to cells, and taking away waste products. The heart is divided into four chambers: the right and left atria, and the right and left ventricles. The atria receive blood from the veins, while the ventricles pump blood to the lungs and other parts of the body. The heart also has a network of valves that regulate the flow of blood and help keep it moving in the right direction.
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Round 0.2897 to the tenths
place.
Answers
0.3
Explanation: The tenths place is the first number after the decimal. The number to the right of this number determines how it will be rounded. If the number to the left of the tenths place is equal to or greater than five, it will round up, meaning in this case, the tenths place will be replaced by a 3. If it is less than 5, it will round down.
the absorbance spectrum below is that of the major pigment from a certain organism found on earth. based on what you know about absorbance, what color would this organism be?
Answers
Absorb blue (400–500 nm) with red color whenever the absorbance level of spectrum is that major with pigment from a organism found on the earth.
The existence or absence of particular absorption characteristics on the surface, as well as their location and form, all affect the spectral reflectance signatures. For photosynthesis, chlorophyll pigments a and b preferentially absorb blue (400–500 nm) and red (600–700 nm) wavelengths. The "green" wavelengths (500–600 nm) experience less absorption, giving off the lush green color of healthy flora. Carotene, a yellow to orange-red pigment, strongly absorbs blue wavelengths (400–500 nm).
The red and blue pigment xanthophyll, which gives deciduous leaves their varied hues, absorbs heavily in the 400–500 nm region. While leaf absorption is minimal, leaf pigments and cellulose are transparent to near-infrared wavelengths (700–1300 nm). Depending on the structural properties of the leaf, the majority of the energy is transmitted and reflected, creating a high near-infrared (NIR) plateau. The red edge, which is used to identify plant stress, is the abrupt rise in reflectance between the red and NIR areas. The soil and leaf water absorption dominates the middle-infrared (MIR) region (1300-2500 nm), especially between 1400 and 1900 nm, with reflectance rising as leaf liquid water content falls.
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Which of the following is a viral skin disease that serves as an example of a latent infection? A. erypsela B. measles C. herpes simplex D. rubella
Answers
Measles is a viral skin disease.
How does a viral skin infection happen?You can contract some viral skin illnesses by touching someone else. One typical example is the chickenpox (although you can also catch chickenpox through the air). The two other conditions we see most frequently in the UK are probably molluscum contagiosum and herpes simplex.
What is the duration of a viral skin infection?Additionally, a fever and bodily aches are possible. Your arms, legs, and other body parts could develop a web-like rash that gets worse in the sun. Droplets on an infected person's breath can spread the disease to you. It typically fades away on its own in 5 to 10 days, but for a few weeks afterwards, the rash could return.
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Aiden and his mom have been hiking for the past three hours in the hot sun. When they finally enter a part of the
forest with lots of trees it is much cooler and a lot darker. Aiden decides to sit down in the shade of the trees and
enjoy the change in temperature before they finish the rest of the hike. What makes this part of the forest cooler?
the nursery
the canopy
selective cutting
succession
Answers
Aiden decides to sit down in the shade of the trees and enjoy the change in temperature before they finish the rest of the hike therefore the part of the forest which makes it cooler is the canopy and is denoted as option B.
What is Temperature?This is defined as the degree of hotness or coldness of a substance and it is influenced by thermal energy. It is measured with the use of a thermometer and its S.I unit is Kelvin.
In places like forest, there are lots of trees which is much cooler and a lot darker as a result of their branches forming a canopy of leaves which helps to shield such area from sunlight.
This shield in the form of a canopy is responsible for making the place cool and darker thereby making option B the correct choice in this scenario.
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contractions of the papillary muscles:____.
a. prevent the av from reversing into the atria
b. close the semilunar valves.
c. close the atrioventricular valves.
d. eject blood from the atria into the ventricles.
e. eject blood from the ventricles.
Answers
Blood is ejected from the atria into the ventricles by contractions of the papillary muscles, which also stop the atrioventricular valves from leaking into the atria.
What effect do the papillary muscles have when they contract?When the myocardia contracts, the papillary muscles, which resemble "nipples," contract as well. By pulling on the chordae tendinae, they prevent the AV valves from prolapsing. Both the left and right ventricles contain the papillary muscles and chordae tendinae.
What stops the reverse movement of AV valves into the atria?The chordae tendinae that connect the leaflets of the atrioventricular valves to the papillary muscles within the walls of the ventricle act as anchors to keep the valves from inverting.
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drag the labels onto the diagram to identify the stages in which the lagging strand is synthesized.
Answers
1. DNA polymerase begins synthesizing the lagging strand by adding nucleotides to a short segment of RNA.
2. After each piece of the lagging stand is complete, it is released from DNA polymerase.
3. A different DNA polymerase replaces the RNA segments with DNA.
4. DNA ligase seals the gaps between the pieces, and eventually forms continuous strand.
How are lag strands produced?
Instead of being formed as continuous duplex DNA, lagging strands are instead created as isolated, small DNA fragments known as "Okazaki fragments." In order to create an Okazaki fragment, a primer comprised of RNA-DNA needs to be produced by polymerase (Pol) -primase.
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behaviorism was characterized by
Answers
Behaviorism is characterised by a strong verificationism. which generally considers unverifiable statements about interior mental life senseless
Among the key philosophers who influenced the development of behaviourism were Ivan Pavlov, John W. Watson, and B.F. Skinner.
"Behaviourism is a learning theory which states all behaviours are learned through interaction with the environment through a process called conditioning."
Behaviorism focuses on the idea that all behaviours are learned through interaction with the environment. This learning theory states that behaviours are learned from the environment, and says that innate or inherited factors have very little influence on behaviour.
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which are indications of dehydration? select one: a. tachycardia and weight loss b. polyuria and hyperventilation c. muscle weakness and decreased deep tendon reflexes d. decreased hemoglobin and hematocrit
Answers
When you use or lose more fluid than you consume, your body becomes dehydrated because it lacks the water and other fluids it needs to function normally. Dehydration will occur if lost fluids are not replaced.
Dehydration can affect everyone, but it is particularly dangerous for small children and elderly people.
Dehydration in young children is most frequently brought on by severe diarrhea and vomiting. Older people naturally have less water in their systems and may have diseases or take medications that make them more susceptible to dehydration.
Age might also affect dehydration symptoms and indicators.
newborn or little child
Dry tongue and mouthAbsence of sobbing tearsFor three hours, no wet diapersreduced cheekbones and eyesSkull's top soft spot is recessed.Vacillation or irritabilityAdult
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Joint movement when you twist head side to side:
Answers
Answer:
The atlantoaxial pivot joint provides side-to-side rotation of the head, while the proximal radioulnar articulation allows for rotation of the radius during pronation and supination of the forearm.
Explanation:
Rotation can be toward the midline of the body, which is referred to as medial rotation, or away from the midline of the body, which is referred to as lateral rotation. Movement of the head from side to side is an example of rotation.
Which of the following distinguishes a possible effect of the efforts of international NGOs operating in the agricultural sector?
Responses:
greater need for American food exports internationally
less need for international aid programs
greater need for domestic private sector research programs
less need for plant scientists worldwide
Answers
The possible effects of the international NGOs is that there would be greater need for American food exports internationally. Option A.
What is an international NGO?An organization that operates independently of the government and broadens the definition of an NGO to include the entire world is known as an international non-governmental organization (INGO).
Numerous sizable international NGOs are transnational federations of national organizations, including Amnesty International, the International Federation of Red Cross and Red Crescent Societies, Oxfam International, CARE, Save the Children, and the World Wildlife Fund.
INGOs have a wide range of responsibilities, including agenda-setting, advocacy, lobbying, public education, social and economic development, and monitoring other international actors. These behaviors are categorized by some researchers as "identifying, framing, blaming, and shaming."
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Answer: less need for international aid programs
Explanation: I just did the assignment
At a distance of 6 meters, a person with average vision is able to clearly read letters 1.0 cm high.
Approximately how large do the letters appear on the retina? (Assume that the retina is 1.7 cm from the lens.)
Answers
The image of letters that appear on retina will be of height 0.00283 m and will be inverted.
What does the term "magnification" mean and how it is calculated?Magnification is the process of visually enlarging an object, not physically increasing its size but only increasing its apparent size.The ratio of the image's height to the object's height is represented by the formula for magnification. Additionally, the letter "m" stands for the object's magnification. Additionally, its formula is Magnification (m) is equal to h/h'. Here, the object's height is represented by h and its height by h'.
How to calculate and form equations?It is given in the question that,
Object separation, u = 6 meters
Lens distance from retina is v = 1.7 cm = 0.017 m.
Height of the object: hu = 1.0 m
here, magnification = [tex]-\frac{v}{u}[/tex] = [tex]\frac{hv}{hu}[/tex]
now, -[tex]\frac{o.o17}{6}[/tex] = [tex]\frac{hv}{1}[/tex]
[tex]hv = \frac{-0.017}{6}[/tex]
[tex]hv = -0.002833m[/tex]
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there are 24 species of hornbills that live in africa, all descended from a common ancestor. there are differences in nesting behavior, feeding morphology, and the habitats in which they are found, which include forests, woodlands, and savannahs. which statement best reflects how ecology and competition could have played a role in diversification of the hornbill lineages? please choose the correct answer from the following choices, and then select the submit answer button. answer choices resource partitioning may have occurred between different groups, resulting in competitive exclusion and speciation during the evolutionary history of hornbills. resource partitioning could have provided a selective force resulting in multiple speciation events over the evolutionary history of hornbills. competitive exclusion due to interspecific competition may have occurred between different groups, resulting in speciation during the evolutionary history of hornbills. competitive exclusion could have provided a selective force resulting in multiple speciation events over the evolutionary history of hornbills.
Answers
Resource partitioning may have occurred between different groups, resulting in competitive exclusion and speciation during the evolutionary history of hornbills. thus correct option (A)
Several species of birds have huge, horn-like bills, and these birds are known as hornbills. There are 54 species of hornbill, with 31 species found in Asia and 23 in Africa, predominantly in tropical rain forests and savannahs. East of the Wallace Line, just four species are present. About 15 million years ago, hornbills first emerged in the fossil record. They appear in several tribes' mythologies from Southeast Asia and Indonesia. The hill tribes of Borneo believe that rhinoceros hornbills carry souls to the afterlife. Every five to seven years, hornbills are celebrated in western Borneo. They serve as faithfulness symbols on Sumba.Hornbills are found only in the Old World. Toucans are regarded as their New World equivalent. The largest hornbill are the size of turkeys. The smallest is the size of doves. Many large ones have horn-like casques on their bill. Some bird live as long as 45 years.As a result of deforestation, habitat loss, and poaching for their bills, feathers, and flesh, several hornbill species are endangered or threatened. Some people have died after ingesting poisons placed out for animals. Others are kidnapped by poachers, who may fetch up to $1,000 per chick for the eggs of certain species.To learn more about hornbill visit:
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the nasal mucosa performs all of the following functions except __________.
Answers
Other than resisting abrasion, the nasal mucosa filters, humidifies, and warms the air that is breathed.
The nasal cavity is lined by nasal mucosa. It is a component of the mucous membrane that lines the respiratory tract, the respiratory mucosa. The periosteum or perichondrium of the nasal conchae is closely attached to the nasal mucosa. It is connected to the skin through the nostrils and to the nasal section of the pharynx's mucous membrane through the choanae. Respiratory mucosa, also known as nasal mucosa, lines the surfaces of the turbinate bones (also known as nasal conchae) and meatuses inside the nasal cavity. Epistaxis, or bleeding from the nose, is brought on by injury to the nasal mucosa's blood vessels. The majority of times, epistaxis is self-limiting; yet, there.
Complete question:
The nasal mucosa performs all of the following functions EXCEPT __________.
a) filter the air
b) humidify the inhaled air
c) warm the inhaled air
d) resist abrasion
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what is the cupula? multiple choice question. a gelatinous cap surrounding the stereocilia and kinocilium of the hair cells a mound of hair cells within the ampulla a patch of hair cells located on the wall of the saccule a dilated sac at one end of the semicircular canal
Answers
cupula (plural cupulas or cupulae) (plural cupulas or cupulae) a dome- or cup-shaped item. (anatomy) A movable component that senses head rotation in the semicircular canals of the ampullae of the ear.
All living things keep an eye on their surroundings, and gravity and how the body is positioned in relation to it are significant elements of that environment. Additionally, creatures that move through locomotion must be able to change their orientation in response to their own movements as well as external pressures. These crucial functions are carried out by the vestibular system. It activates a number of reflex pathways that are in charge of compensatory movements and postural adjustments. In order to provide perceptions of gravity and movement, it also activates neural pathways that lead to the cupula . The Chapter's first section begins with a description of the peripheral sensory apparatus and explains how specialized receptors transduce information.
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What is the chromosome composition of a normal human male? 44 autosomes; 1 X chromosome, and 1 Y chromosome 46 autosomes; 1 X chromosome; and 1 Ychromosome 22 autosomes and 2 Y chromosomes 44 autosomes and 2 Y FHronlasoinesh
Answers
A normal human male has 44 autosomes, 1 X chromosome and 1 Y chromosome.
What are chromosomes?
Each cell's nucleus contains chromosomes, which are structures that resemble threads and contain the DNA molecule. Each chromosome is constructed from DNA that has been tightly wound around proteins called histones numerous times to support its structure.When a cell is not dividing, chromosomes cannot be seen in the nucleus, not even under a microscope. However, during cell division, the DNA that makes up chromosomes gets more compactly packed and becomes visible under a microscope. The majority of what scientists understand about chromosomes comes from studying them during cell division.Normal chromosomes:
Humans typically have 46 chromosomes, or 23 pairs of them, in each cell. The appearance of twenty-two of these pairs, known as autosomes, is the same in both sexes. Males and females have different 23rd pair sex chromosomes. Males have one X and one Y chromosome, while females have two copies of the X chromosome.
Hence A normal human male has 44 autosomes, 1 X chromosome and 1 Y chromosome.
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researchers added dinitrophenol (dnp) to cultured myocyte mitochondria. if dnp allows facilitated diffusion of protons across the inner mitochondrial membrane without passage through the atp synthase, which change to atp levels is expected over time? a. increasing atp levels after addition of dnp b. decreasing atp levels after addition of dnp c. constant atp levels after addition of dnp d. constant atp levels before and after addition of dnp
Answers
Expected ATP change over time with DNP is option B: decreasing ATP levels after addition of DNP.
With the addition of DNP, protons would be able to freely permeate across the membrane, quickly shutting down ATP synthase. Answer C is not a viable option because as DNP starts to work, some protons may still pass through the synthase molecule and any ADP molecules that are already loaded would be converted to ATP. Nevertheless, it cannot be said that zero ATP will be formed immediately after the addition of DNP.
DNP is an uncoupler, it disrupts the ATP synthesis by leaking protons across the inner mitochondrial membrane. As a result of stopping the pumping of hydrogen ions, the proton gradient cannot occur across the membrane. As a result, the inner mitochondrial membrane's pH will drop, and ATP production will be less effective.
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what event occurred during this cycle of meiosis
Answers
Pairing of homologous chromosomes occurs during the cycle of meiosis.
There are two divisions in meiosis; the first division is meiosis I: the number of cells is doubled but the number of chromosomes is not. This results in 1/2 as many chromosomes per cell. The second division is meiosis II: this division is like mitosis; the number of chromosomes does not get reduced.
In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells, each with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II.
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what are two ways the growth of an organism can be accomplished through the events of the cell cycle?
Answers
The two ways the growth of an organism can be accomplished through the events of the cell cycle are during production of cells and when cells are damaged, more cells are needed.
Cells are of two types eukaryotic and prokaryotic and they give rise to their off-springs by the process of mitosis or meiosis. The growth and development of an organism refers to the change in terms of physical and physiological parameters. Synthesis or the S phase is when the cell copies its DNA sequence. Growth of cells can happen when the cell increases in size or in number of cells. All eukaryotic organisms grow by the process of mitosis. In such organisms, the cell cycle consists of four discrete phases namely G1 phase, S phase, G2 phase, and M phase.
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Articulates with hip bones of the pelvis?
Answers
The femur articulates with the hip bones of the pelvis.
When it comes to tetrapod animals, the femur, often known as the thigh bone, is the proximal bone of the hindlimb. The posterior section of the femur articulates with the tibia and patella to form the knee joint, while the top of the femur articulates with the acetabulum in the pelvis to produce the hip joint. Together, these three bones come together to form the knee joint. When compared to the other bones in the body, the femurs, both left and right, are considered to be the most robust. They are also the largest and most robust bones in humans.
The complete question is;
What bone articulates with the hip bones of the pelvis?
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A sample of mice (all from the same parents) shows 58 Black hair, black eyes | 16 Black
hair, red eyes | 19 White hair, black eyes 7 | White hair, red eyes
Your tentative hypothesis: The parents are both heterozygous for both traits.
Answers
The parents are heterozygous for two loci
How to illustrate the information?This is an example of dihybrid cross as the ratio come to be around 9:3:3:1 for phenotype.
58 black hair black eyes
16 black hair red eyes
19 white hair black eyes
7 white hair red eyes
Alleles are mutated or alternative forms of genes found at loci. A cross can be used to test whether the parents are heterozygous for two loci.
The parent of a dihybrid cross has a cross involving two characters.
Parent generation : Male genotype WWRR * Female genotype wwrr
phenotype: Black hair black eyes White hair red eyes
W allele is for Dominant Black hair over recessive w allele for white hair
R allele is for Dominant Black eyes over recessive r allele for red eyes
F1 generation: WwRr * WwRr
F2 generation: The total gametes form would be 4 as the formula for the gametes is 2n where n is total number of heterozygotes which is 2 (Ww and Rr).
Here, we will get;
Black hair, black eyes (W_R_) =9
Black hair, red eyes (W_rr) =3
White hair, black eyes(wwB_) =3
White hair, red eyes(wwrr) =1
This shows that the parents are heterozygous for two loci as proven by the above dihybrid cross.
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What test did you pick to distinguish your two organisms Enterobacter aerogenes and Serratia Fonticola?
Answers
The fast gramme positive test used to distinguish between serratia and Enterobacteriaceae is different from both.
The large family Enterobacteriaceae contains opportunistic gram-negative microorganisms called Serratia species. Serratia are significant in the environment, but they are a common component of the flora found in human faeces. In terms of pathogenicity, Serratia marcescens is the most prevalent species.So it has been desired to quickly differentiate Serratia from Enterobacter. Serratia takes only five minutes to produce the blue-inexperienced indigo shadeation, but Enterobacter takes half an hour.
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