One long extension (axon) in sending impulses and typically several branches (dendrites) in receiving impulses make up the big cell body that makes up a nerve cell (or neuron).
The dendrite of one cell receives impulses from of the axon that travel across a synapse, or the junction among two nerve cells. The component of a nerve (neuron) known as the axon, also known as a nerve fibre, is responsible for carrying nerve impulses out from the neuron body. Typically, a neuron contains one axon which connects it to other neurons, muscle cells, or glandular cells. Some axons may extend all the way from of the spinal cord to the tip of a toe, for instance. An axon is a lengthy fibre that emerges from the neuron's cell body. It sends nerve impulses outside of the cell body.
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which type of membrane protein transmits information into the cell by responding to signal molecules?
Receptor protein are membrane protein transmits information into the cell by responding to signal molecules.
Receptors are the type of transmembrane proteins, that binds to the signaling molecules present outside the cell and ultimately transmit the signal with the help of sequence of molecular switches to internal signaling pathways.
Hence , instead of the nature of the signal, the target cell present will responds in terms of a specific protein known as receptor, that successfully binds with signal molecule and then initiates a response in the target cell.
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QuestionAn organism made up of many cells is known as:AUnicellularBMulticellularCAcellularDNone of the aboveEasy
An organism made up of many cells is known multicellular organism option b)
A multicellular organism, as opposed to a unicellular organism, is one that has more than one cell.
All animals, land plants, and most fungi are multicellular, as are many algae, with the exception of slime molds and social amoebae such as the genus Dictyostelium, which are partially unicellular and partially multicellular.
Multicellular creatures form in a variety of methods, including cell division and the aggregation of many single cells.
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the outer portion of the pericardium is a tough, dense connective tissue layer called the ______ pericardium.-fibrous-epicardium-parietal-visceral
The outer portion of the pericardium is a tough, dense connective tissue layer called the fibrous pericardium.
The heart and the roots of the major vessels are contained within the pericardium, commonly known as the pericardial sac. It consists of two layers: a serous membrane-covered inner layer and a fibrous pericardium-covered outer layer (serous pericardium). It defines the middle mediastinum and encloses the pericardial cavity, which is filled with pericardial fluid. It keeps the heart free from interference from other organs, shields it from infection and stress, and lubricates the beats of the heart.
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what is the mostly phylogenetic tree based on these shared derived characters? When did these characters appear during the aliens'evolutionary history? Drag the lens and shared derived characters to their appropriate locations on this phylogenetic tree.
A derived feature is one that emerged in the lineage before a clade and distinguishes members of that clade from other people, whereas a shared character is one that two lineages share in phylogenetic tree.
How does a phylogenetic tree work?Understanding a phylogeny is analogous to reading a family tree. The root of the tree represents the lineage of the ancestors, while the points of the branches represent their descendants. By moving from the root to the tips, you advance through time. A lineage splitting (speciation) is shown as branching on a phylogeny. When a speciation event occurs, a single ancestral lineage produces two or more daughter lineages. A clade is a grouping of all current and extinct individuals of a lineage who descend from the same ancestor. A phylogeny makes it easy to establish whether a group of lineages is a clade. The phylogeny might be simplified by deleting just one branch, where the severed branch now contains a clade.
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Coat color in mice is incompletely dominant. Yellow (Y) and white (W) -colored mice are homozygous, while cream-colored mice are heterozygous (W). If two cream-colored mice mate, what percentage of each phenotype can we expect of their offspring? Show the Punnett Square.
The percentage of each phenotype can we expect of their offspring is
WC = Cream colored = 50%
WW = White = 25%
YY = Yellow = 25%
The punnett square is somewhat like this:
W Y
W WW WY
Y WY YY
What is a punnett square?
The Punnett square is described as a square diagram that is used to predict the genotypes of a particular cross or breeding experiment.
Referring back to the yellow and white mice being homozygous (two of the same traits) we can gather from the punnett square the ratios for both.
Because it is incomplete dominance we know that all the traits are of course dominant.
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You examine a tissue sample under the microscope and discover that the tissue appears to be striated muscle. what can be concluded from this observation?
If a tissue has a striated appearance, it is likely made up of long, cylindrical cells with many nuclei and has a distinctive pattern of alternate light and dark bands, or striations, running the length of it.
Striated muscleThis kind of muscle tissue, often referred to as skeletal muscle or voluntary muscle, is in charge of the body's movement as well as the preservation of posture and the production of heat.This means that if a tissue sample resembles striated muscle, it was probably produced from an animal or human's skeletal muscle. This discovery offers important data for the identification and categorization of the tissue, information that can be applied to areas like anatomy, physiology,Several places where striated muscle can be found are as follows:
Striated muscle, which is present throughout the arms and legs and is responsible for limb movement.Back: Strong back muscles are essential for supporting the spine and preserving proper posture.The striated muscles of the abdomen are crucial for breathing as well as core strength and stability.Face: Facial emotions like a smile or a frown are produced by the striated muscles of the face.Speech and swallowing are controlled by striated muscles in the tongue and throat.learn more about striated muscle here
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What structures are similar in appearance but not in structure?
Analogous structures are those found in similar ways in unrelated animals. These structures are analogous because they serve the same purpose rather than because they have a common ancestor.
What structure, though similar in structure, serves a different purpose?Serial homologous refers to a situation where two or more organs or structures are substantially the same in terms of construction but have been altered to serve distinct purposes. Bat wings and whale flippers are two examples of this.
What do structures that differ in appearance but are related in origin mean?Homologous structures are those with the same evolutionary ancestry, despite the fact that they will ultimately have different structural roles or different physical characteristics.
As opposed to sharing a common evolutionary origin, analogous structures are features or structures that are comparable in two separate species. In other words, despite the structures' distinct evolution, they are comparable due to similar selective forces.
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the uterus serves as the site of implantation for the embryo, supports the developing embryo, and contracts during birth to expel the fetus. (True or False)
The uterus serves as the site of implantation for the embryo, supports the developing embryo, and contracts during birth to expel the fetus. The given statement is true.
ImplantationThroughout gestation, the uterus nurtures the growing embryo and fetus. During labor, the baby is helped to pass through the vagina by contractions of the uterus' smooth muscle. A piece of the uterine lining sheds throughout each menstrual month if fertilization does not take place.Generally 2-4 days after the morula enters the uterine canal, the blastocyst attaches to the uterine epithelium to begin the process of implantation. Typically, the upper and posterior wall of the midsagittal plane of the human uterus houses the implantation site.The uterus's functions include retaining the fertilized ovum until it is ready to develop into a fetus and give birth to the child.For more information on development of embryo kindly visit to
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what is the name of the structure located inside the cochlea that contains auditory receptors?
The Organ of Corti, which is part of the cochlea, is an inner ear structure that aids in hearing. The Organ of Corti is made up of three rows of outer hair cells and one row of inner hair cells.
What do we mean by auditory receptors?A mechanoreceptor cell found in the inner ear that responds to auditory stimuli. The arrangement of the accessory sensory structures ensures that the movement of the hair-like projections (stereocilia and kinocilia), which transmit information to the central processing unit of the nervous system, is triggered by the appropriate stimuli. The Organ of Corti, a sensory receptor located inside the cochlea, contains nerve receptors for hearing in sensory cells with hair-like structures (hair cells). The cochlea contains two fluids (endolymph and perilymph).
The Organ of Corti of the cochlea is a sensory organ that houses the hair cells that serve as nerve receptors for hearing.
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which of the following statements is correct? prokaryotic cells and eukaryotic cells evolved at about the same time. prokaryotic cells evolved a lot earlier (over a billion years) than eukaryotic cells. eukaryotic cells evolved a lot earlier (over a billion years) than prokaryotic cells.
Prokaryotic cells evolved a lot earlier (over a billion years) than eukaryotic cells.
Prokaryotic cells, such as bacteria, are the simplest and most primitive type of cells. They first appeared on Earth around 3.5 billion years ago and have been highly successful, thriving in a wide range of environments. On the other hand, eukaryotic cells, which are more complex Prokaryotic cells and include all animal and plant cells, evolved around 2 billion years ago. The evolution of eukaryotic cells was a major event in the history of life, as it made possible the development of complex multicellular organisms. The presence of a nucleus and other membrane-bound organelles in eukaryotic cells allowed for the specialization of cellular functions, which was crucial for the evolution of higher life forms.
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What part of the neuron carries the action potential and is the main source of output?
A. axon
B. synapse
C. dendrites
D. nucleus
A neuron is prompted to transmit an impulse along its axon when this threshold is crossed; this impulse is known as an action potential. Thus, option A. Axon is the correct answer,
Information travels through the entire human body on neurons. They assist in coordinating all of life's crucial functions by using electrical and chemical signals. Neurons and describe how they function. In essence, both internal and exterior events are detected by our nerve systems, which then decide how to respond and change the state of our internal organs (such as changing our heart rate). Finally, they assist us in remembering and reflecting on what has happened. Utilizing neurons, a highly advanced network, it accomplishes this. The lengthy axon that extends from the soma carries information to neighboring cells. This represents the cell's "output". Several synapses attaching to the dendrites of additional neurons are how it usually ends.
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Which description gives an example of acute exposure to a toxicant?
OA. A child experiences developmental delays from years of contact
with lead.
OB. A rescue worker experiences respiratory damage from smoke
inhalation at a fire.
C. A factory worker falls ill after repeated, very small doses of a
chemical product.
OD. A person develops lung cancer after a lifetime of smoking
cigarettes.
Answer:
C. A factory worker falls ill
Explanation:
Acute exposure is a short contact with a chemical. It may last a few seconds or a few hours. For example, it might take a few minutes to clean windows with ammonia, use nail polish remover or spray a can of paint. The fumes someone might inhale during these activities are examples of acute exposures.
Answer: b. A rescue worker experiences respiratory damage from smoke inhalation at a fire.
Explanation: just did it
while looking at slides of brain tissue in a physiology class, a student sees groups of damaged neurons that have collected around a core of protein. what is the student looking at?
In a physiology class using slides of brain tissue, a student notices clusters of injured neurons that have gathered around a protein core. The pupil viewing is brain infarct or cerebral infarct
The student is likely looking at a slide of brain tissue from a person who had a stroke. The groups of damaged neurons that have collected around a core of protein are known as a "brain infarct" or "cerebral infarct" and are a common feature of strokes.
Strokes occur when blood flow to a part of the brain is disrupted, either by a blood clot or a ruptured blood vessel. This lack of blood flow deprives the affected brain tissue of oxygen and nutrients, leading to cell death and tissue damage.
The core of protein that the student observed is likely the result of the breakdown and accumulation of cellular debris and dead neurons in the affected area. This can cause the tissue to become swollen and inflamed, leading to further damage and dysfunction.
Strokes can have a wide range of symptoms, depending on the location and severity of the infarct. Common symptoms include weakness or paralysis on one side of the body, difficulty speaking or understanding language, vision problems, and cognitive impairment. Treatment typically involves addressing the underlying cause of the stroke, such as blood clot removal or blood pressure management, as well as rehabilitation to help patients regain lost function and prevent future strokes.
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Explain why viruses, chloroplasts and mitochondria are exceptions to cell theory
Viruses, chloroplasts, and mitochondria are exceptions to cell theory because they are not composed of cells.
What is mitochondria?
Mitochondria are organelles found in the cells of all eukaryotic organisms, such as animals, plants, and fungi. They are often referred to as the "powerhouse" of the cell, as they generate the majority of the cell's energy in the form of adenosine triphosphate (ATP). Mitochondria also have a variety of other roles, including metabolism and calcium storage. They are semi-autonomous, meaning that they can replicate and divide independently of the cell, and contain their own DNA.
Viruses are not composed of cells and instead are composed of genetic material, typically DNA or RNA, surrounded by a protein coat. Chloroplasts and mitochondria, on the other hand, are organelles contained within cells and are composed of their own genetic material and protein coat. Therefore, they are not considered to be cells themselves.
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Cat-like eyes (E) are dominant to round eyes (e). Cross a mom monster with round eyes with a dad monster who has homozygous alleles for cat eyes.
50% of the offspring would inherit one dominant and one recessive allele (Ee) and have cat-like eyes
define offsprings ?
Offspring refers to the young or progeny of an organism produced by sexual or asexual reproduction. They inherit genetic material from their parents, determining their physical and behavioral traits. The term is commonly used to refer to the offspring of animals, but it can also apply to plants and other organisms.
Assuming that both the mom monster and dad monster are hybrids (heterozygous) for the eye shape gene:
The mom monster would have the genotype Ee (one dominant allele and one recessive allele)
The dad monster would have the genotype EE (two dominant alleles)
Using a Punnett square to cross these two monsters would result in the following offspring:
E e
E EE Ee
e Ee ee
50% of the offspring would inherit one dominant and one recessive allele (Ee) and have cat-like eyes
50% of the offspring would inherit two recessive alleles (ee) and have round eyes
All of the offspring would inherit one allele from each parent. Since the dominant cat-like eye allele (E) is present in the dad monster, and it only takes one copy of the dominant allele to express the trait, half of the offspring will have cat-like eyes.
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A researcher identifies the nucleotide sequence AAC in a long strand of RNA that was just transcribed in the nucleus. In the genetic code, AAC codes for the amino acid asparagine. When that RNA leaves the nucleus and becomes involved in translation, will asparagine necessarily appear in the protein? Use specific content to support your argument.
According to the question, when that RNA leaves the nucleus and becomes involved in translation:
it is not necessary that asparagine will appear in the protein.
After being transcribed in the nucleus, the RNA is processed in the cytoplasm before being translated into a protein. Ribosomes commence the translation process by reading codons, or three-nucleotide sequences, and attaching the matching amino acid to the developing protein chain. The codon AAC only codes for asparagine when it is surrounded by other codons. If the codon AAC is part of a larger codon sequence that codes for another amino acid, the protein will contain that amino acid rather than asparagine. As a result, the codon AAC can be transcribed in the nucleus and subsequently translated into a protein that lacks asparagine.
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What are the 2 domains of Bacteria?
In the early stages in the history of life, the two prokaryote kingdoms, Bacteria and Archaea, separated from one another.
Bacteria come in a wide variety, from pathogens that cause disease to helpful photosynthesizers and symbionts.Prokaryotes are everywhere, yet they can be challenging to find, count, and categorise. Only a small portion of the prokaryotic species that are predicted to exist are represented by those that we currently understand.In fact, in the world of prokaryotes, the concept of a "species" itself becomes complex.The key prokaryotic groupings at first Then, we'll look at why it can be difficult to categorise and recognise them. Finally, we'll look at how DNA sequencing techniques are enabling us to understand the prokaryotes that surround us.
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Does epinephrine have to cross the cell membrane?
Epinephrine cannot pass the cell membrane, thus cAMP, functioning as a second messenger, transmits its hormonal signal within the cell .
What is the purpose of epinephrine?
Descriptions. An injection of epinephrine is used to treat severe allergic responses (including anaphylaxis) to meals, medications, insect stings, foods, or other substances in an emergency. It can also be used to alleviate anaphylaxis brought on by unidentified chemicals or brought on by physical activity.
When should you administer epinephrine?Even if individuals do not satisfy diagnostic criteria, epinephrine should be given as quickly as possible after anaphylaxis has been diagnosed or if oncoming anaphylaxis is anticipated. Administration delays have been linked to increased mortality.
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what is the name of the concept that represents perceivable differences in stimuli as registered by human sensory organs?
a. Threshold categorization
b. Minimal differences
c. Just noticeable difference
d. behaviorism
a) Threshold categorization , The difference in a stimulus that can only just be recognised is referred to as the differential threshold (or just discernible difference, commonly abbreviated as "JND").
What is differential Threshold?Regression and a group of algorithms collectively known as classification make up supervised machine learning (ML). On data, supervised ML makes predictions. These forecasts can be expressed as a continuous value or a discrete class. Classification handles discrete use cases (such yes/no or true/false predictions), while regression handles continuous use cases (such as propensity scores or price predictions).The sigmoid function returns a probability for the positive class, or the class that is most important to our prediction, between 0 and 1. The softmax function produces a probability for each class and is a generalisation of the sigmoid to more classes. Although both functions give the same result for the positive class in binary classification, the sigmoid is more frequently employed in practise than the softmax because it is less expensive to calculate and functions more smoothly.
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what will happen to the freshwater fish if you place it in sea water and why?
If a freshwater fish is placed in sea water, it will most likely die.
This is due to the sea water's much higher salinity than what freshwater fish are used to. Osmotic stress is brought on by this, and it can result in electrolyte imbalance, dehydration, and finally death.
Seawater normally has a salinity of 3.5% to 3.8%, whereas freshwater has a salinity of 0%. Since there is more salt in seawater than freshwater, the freshwater fish's cells osmotically lose water, contracting and changing form.
This process can produce an electrolyte imbalance, which can impair important processes like the fish's capacity to take oxygen from the water, ultimately resulting in death.
Further problems and even death may result from the freshwater fish's inability to expel waste due to the presence of salt in the sea water.
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a scientist conducted an experiment to determine how the amount of oxygen in a body of water affect the number of aquatic plants that can live in the water . in this experience the dependent variable is
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. Amount of salt in the water is the independent variable option c)
Scientific MethodThe scientific method is a way of learning that involves formulating and evaluating hypotheses.The scientific method is a rational, methodical approach to answering problems that eliminate subjectivity by requiring each response to be backed up by objective data that can be replicated.Steps in Scientific MethodAsk a question.Perform research.Establish your hypothesis.Test your hypothesis by conducting an experiment.Make an observation.Analyze the results and draw a conclusion.Present the findings.Two types of research variables:INDEPENDENT VARIABLE: Independent variable causes the change on the dependent variable.
DEPENDENT VARIABLE: Dependent variable is the variable that is being measured in an experiment.
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Full Question :A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. Which is the independent variable?
A. Water
B. Temperature of the water
C. Amount of salt in the water
D. Number of plants in the water
Which of the following terms is used to describe an area of the body that is farther from the median plane?A. ProximalB. LateralC. MedialD. IpsilateralE. Contralateral
B. A region of the body that really is further away from median plane is referred to as lateral.
Distance from the trunk, the site of origin of a portion, or both, is referred to as distal (example, the hand is located at the distal end of the forearm). It is lateral's antithesis. The phrase refers to the general placement of body parts. For instance, the arm is medial to a chest. Looking upward (away from the head or lower section) from the base of a structure Near the surface of the body is referred to be superficial. Deep: Away from the surface of the body. Proximal: A structure's origin is nearer. Distance from the origin that is distal.
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Because we know that DNA has complementary strands, what is
the complementary strand for DNA if one strand is:
3' ATGGGCAACGTCAT 5'
Answer:
TACCCGTTGCAGTA
Explanation:
A > T
T > A
C > G
G > C
Why do sex-linked traits follow different patterns of inheritance than other
traits?
• A. Males only have one X chromosome.
B. Females only have one X chromosome.
• C. Males only carry recessive alleles.
D. Females only carry dominant alleles.
Genes on non-sex chromosomes (autosomes) inherit differently than X-linked genes, hence option A is correct.
What are sex-linked traits?One of the sex chromosomes, which are the X and Y chromosomes, is how sex-related disorders are inherited. That's because males and females have differing quantities of copies of these genes.
When one parent's faulty gene can cause an illness while the other parent's identical gene is normal, this is known as dominant inheritance.
Therefore, males only have one X chromosome, so sex-linked traits follow different patterns of inheritance than other traits.
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which of the following occurs prior to speciation? question 1 options: different species share the same space. organisms of different populations join together. a major change on earth takes place. a population is divided.
The population is divided prior to speciation. Thus, C is the correct option.
Speciation can be defined as the process of formation of new species that are distinct from old species and formed during the course of evolution of old species.
In other words, when one species gives rise to two or more different species during the course of its evolution, it is termed as speciation.
An example is 13 distinct species of Galapagos finches which are a bird species, an due to allopatric speciation which were formed from single ancestral species (ans geographical isolation that occured by ocean).
Speciation start to take place on a genetic level between two isolated populations when allele frequencies change in different ways.
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The correct question is:
Which event occurs prior to speciation?A) Different species share the same space.
B) A major change on earth takes place.
C) A population is divided.
D) Organisms of different populations join together.
lucose is often present in very low concentrations in environments populated by microorganisms. to import the maximum amount of available glucose, cells use:
Active transport in cellular biology is the movement of molecules or ions across a cell membrane against the concentration gradient from one area of lower concentration to another.
This movement necessitates active transport, which uses cellular energy. Adenosine triphosphate (ATP) is used in primary active transport, whereas an electrochemical gradient is used in secondary active transport.
Active transportation options include:
macrophage phagocytosis of bacteriaHeart muscle cells release calcium ions.White blood cell defence against invading illnesses; protein release from a variety of cells, including enzymes, peptide hormones, and antibodies; transportation of amino acids across the intestinal epithelium in the human intestine.Learn more about amino acids here:
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to lift 200 N weight to a height of 1 meter by hand a mover did 2000J of work assuming the pulleys are frictionless how much work does he do when using a block and tackle
The mover would only need to do 200 J of work when using a block and tackle to lift the weight, which is 10 times less work compared to doing it by hand (2000 J).
A block and tackle is a mechanical system of pulleys and ropes that is commonly used to lift heavy weights.
If we assume that the pulleys in the block and tackle are also frictionless, the mover would have to do less work to lift the same 200 N weight to a height of 1 meter compared to doing it by hand.
The amount of work done by the mover using a block and tackle can be calculated using the formula:
Work = Force x Distance
Since the weight being lifted is 200 N and the distance it is being lifted is 1 meter, the work done by the mover using a block and tackle can be calculated as:
Work = 200 N x 1 m = 200 J
Therefore, the mover would only need to do 200 J of work when using a block and tackle to lift the weight, which is 10 times less work compared to doing it by hand (2000 J).
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. explain how a change in nucleic acids (dna) can cause a change in carbohydrates or lipids in the body of an organism following the central dogma. (5)
According to the Central Dogma, RNA is the next step in the translation of genetic information from DNA into proteins.
Thus, any change in nucleic acid (DNA) can result in a change in the proteins generated, which can then result in a change in the carbohydrates or lipids in an organism's body.
This is owing to the fact that proteins are in charge of carbohydrate and lipid synthesis, and any change in the main structure of the protein created as a result of a change in the nucleic acid may cause the protein to operate differently, resulting in changes in the total quantities and kinds of carbs or lipids produced.
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18. In pea plants, round peas are dominant to wrinkled peas. Complete the cross Rrx
Rr. What percentage of the offspring would you expect be round?
A) 25%
B) 50%
C) 75%
D) 100%
Round peas outnumber wrinkled peas in pea plants. 50% of the offspring following the cross Rrx completion should be spherical.
option B
50% of the F1 generation's progeny had wrinkled seeds. Heterozygous (Rr) round seeds plants will result from a cross between homozygous round seeds plants (RR) and homozygous wrinkled seeds plants (RR) as F1 generation. Round seeds are a dominant characteristic in pea plants, whereas wrinkled seeds are a recessive trait. For the pea plant's seed form in this instance, "R" is the dominant allele and "r" is the recessive allele. The seed bearing plant would have genotype RR. The plant with genotype rr would thus produce seeds that were wrinkled.
As a result, if the outcome is entirely tall plants, the parent's genotype will be homozygous dominant (TT), and if it is 50% tall and 50% dwarf, the parent's genotype will be heterozygous.
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what is the dominate hair color of the beefmaster?
Black, Brown, and Red are the three standard coat hues for cattle. They are brought on by a single set of genes that control the quantity (and colour) of pigment produced.
The black gene, which makes hair black, is more prevalent than the other two. Only red pigment is produced by the red gene, which is recessive to the other two genes. The brown gene, which is most likely the original, "wild" type hue, induces the development of both red and black pigment in variable degrees, producing a colour that ranges from red with some dark on the legs and head to virtually black. These nearly-black cattle typically have a brown or mealy muzzle.
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