Explanation:
The phenotypes and genotypes of the progeny can be determined by a dihybrid cross of the parents.
The heterozygous male will have the genotype 'SSww' and the heterozygous female will have the genotype 'ssWW'.
When crossed, the F1 offsprings will have a hybrid genotype of 'SsWw'. These offsprings are heterozygous with spotted skin and wooly hair.
On self-crossing of the F1 hybrids, we find four different combinations of the alleles- SW, Sw, SW and sw. The probability of getting each of these combinations is 1/4.
Hence, the probability of any dihybrid type is 1 out of the 16 possible genotypes. Using Punnet square, we find
9 SSWW: 3 SSww: 3 ssWW : 1 ssww
This is the phenotypic ratio of the offsprings.
The ratio of the possible genotypes will be 1:2:1:2:4:2:1:2:1.
A particular plant has two alleles that control the length of its stem. t represents the dominant allele that codes for a tall stem, and t represents the recessive allele that codes for a short stem. based on the punnett squares, which two statements are true about the genotype of the plant’s stem length?
A particular plant has two alleles that control the length of its stem. T represents the dominant allele that codes for a tall stem, and t represents the recessive allele that codes for a short stem. Based on the Punnett squares, which two statements are true about the genotype of the plant’s stem length?
First Generation
__t_ t
T Tt Tt
T Tt Tt
Second Generation
__T_ t
T TT Tt
t Tt tt
Select all the correct answers.
A) Plants with short stems are homozygous for that trait.
B) Plants with tall stems are always homozygous for that trait.
C) Both parent plants in the second generation are heterozygous.
D) Both parent plants in the second generation are homozygous.
The correct answers are options A and C.
How, explain your answer briefly?The Statement A says that the plants, which have a short stem is homozygous for the trait. According to the question, the allele for the short height is recessive. A recessive trait can only be observed, when the dominant allele is not at all present. Hence, the plant must have tt allele, so, the plant having short stem would be homozygous recessive.
The statement C says that the both parents in second generation are heterozygotes. It is given that the parents in the second generation have aa genotype Tt. In this case, both the alleles are different, hence, the parent plants are heterozygotes.
Thus, this could be the answer.
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After an investigation, Kuri determines that her hypothesis was wrong. What is the best thing for Kuri to do next?
propose a scientific theory that explains what went wrong
write a new hypothesis and conduct new experiments to explore the matter
rewrite a scientific law to better predict the observations she gathered
move on to a different topic because there is no value in a wrong hypothesis
Write a new hypothesis and conduct new experiments to explore the matter. Thus, option "B" is correct.
What is the Hypothesis?Hypothesis
The formulation of hypotheses is one of the key steps in the scientific method.
Hypotheses are usually tested using experiments and are usually accepted or rejected depending on the outcome of the experiments.
If a hypothesis is rejected, it does not mean that the entire subject is abandoned. Rather, new hypotheses may be formed and experiments conducted to further explore the subject.
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What does the term angiosperm literally mean?
A. seed leaf
B. enclosed seed
C. open seed
D. seed cone
Answer:
Angiosperm. n., plural: angiosperms. [ˈændʒɪəˌspɜːm] A flowering, fruit-bearing plant or tree known for having ovules (and therefore seeds) develop within an enclosed ovary.
Answer: B. Enclosed seed
Explanation:
What are the defining characteristics of chondricythyes?
Species in this class have paired fins, hard scales, a two-chambered heart, and a pair of nostrils. Most species have 5-7 gill slits on each side of their body.
Chondrichthyes are cartilaginous fishes and are mostly marine with basic fish attributes.
ChondrichthyesThey are a class of fishes known as cartilaginous fishes. They possess all the characteristics of fishes in addition to features such as:
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32. 8) What type of solution has an equal concentration of substances on both sides of the membrane?
A. osmosis
B. hypotonic
C. isotonic
D. Otonic
D. hypertonic
Answer:
C. isotonic
What is a isotonic solution?
Two solutions exerting the same osmotic pressure over a semipermeable barrier are said to be in an isotonic solution. Without affecting the concentration of solutes on either side, this condition enables unrestricted passage of water over the membrane.
What is osmosis?The tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.
4 which two biomolecules are most often
analyzed to establish homologies between
different species?
Answer:
DNA and protein
Explanation:
two biomolecules are most often
analyzed to establish homologies between
different species are DNA and proteins
Explain in your words the light-dependent
reaction and the light-independent reaction
Answer: In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.
Explanation:
Which is an abiotic factor that can be found in a rain forest ecosystem?
Answer:
rainfall
Explanation:
there is a high rate of rainfall in rainforest, therefore amount of rain fall being abiotic factor can affect rain forest
s. aureus has been isolated from george’s infected wound. to satisfy koch’s postulates, what would george’s doctor need to do with the isolated s. aureus?
George's doctor will need to culture the isolated S. aureus to determine if the isolated bacterium is the one responsible for the infection.
What is Koch's postulates?Robert Koch was a famous microbiologist that made some postulates as follows:
The bacteria must be present in every case of the disease.The bacteria must be isolated from the host with the disease and grown in pure culture.The specific disease must be reproduced when a pure culture of the bacteria is inoculated into a healthy susceptible host.The bacteria must be recoverable from the experimentally infected hostAccording to this question, S. aureus has been isolated from George’s infected wound.
This means that in accordance with Koch's postulates, George's doctor will need to culture the isolated S. aureus to determine if the isolated bacterium is the one responsible for the infection.
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In a certain population of rabbits, the allele for brown fur is dominant over the
allele for white fur. If 20 out of 100 rabbits have white fur, what is the allele
frequency for the dominant allele?
How does cell volume affect nutrient exchange between the cell and its external environment.
Answer:
The ratio of cell volume to surface area determines the efficiency of nutrient exchange.
Explanation:
Which of the following is a function of the plasma membrane?
a. breaks down lipids, carbohydrates, and proteins from foods
b. stores water, salt, proteins, and carbohydrates
c. keeps the cell wall in place
d. regulates which materials enter and leave the cell
Climate has changed over geologic time. How does this map provide evidence to support this claim?
Large sources of fossil fuels are found in cold regions shows evidence of climate change.
What this map shows?This map shows that large sources of fossil fuels are found in cold regions because fossil fuels are extracted from the living organisms body so in cold regions once there was a large number of organisms lived there. When they died the fossil fuel sources are formed.
So we can conclude that large sources of fossil fuels are found in cold regions shows evidence of climate change.
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ou add a fluorescent antibody to a cell surface protein to a dish of cells. Looking at an individual cell under the microscope the entire surface of the cell is fluorescent. You then hit the cell with a brief pulse from a laser which bleaches out part of the fluorescence on the cell. Over time you notice that the entire surface of the cell becomes fluorescent again. What is the best explanation for this observation
The best explanation for this observation is that the proteins from parts of the cell membrane that were not bleached with the laser diffuse into regions of the membrane that were bleached.
What is an observation?It should be noted that observation means the active acquisition of information from a source.
In this case, the best explanation for this observation is that the proteins from parts of the cell membrane that were not bleached with the laser diffuse into regions of the membrane that were bleached.
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please help i need to turn this in
Answer:
DNA mRNA Amino acidsGCA CGU Arginine
ATG UAC Tyrosine
CAC GUG Valine
After deletion of "G".
DNA mRNA Amino acids
CAA GUU Valine
TGC ACG Threonine
AC UG ---
Answer:
Normal Strand: alanine - methionine - histidine
Mutated Strand: glutamine - cysteine - no third amino acid.
Explanation:
Messenger ribonucleic acid (mRNA) is the RNA that is used in cells for protein synthesis. It has a single strand made by the transcription of DNA by RNA polymerase. It contains four nucleotides: Adenine (A), Guanine (G), Cytosine (C), and Uracil (U).
Before transcribing, we need to create the complementary strand of the DNA. We're going to write out the nucleotides of the complementary strand by matching the nucleotides in these pairs: (A & T) and (C & G).
Normal Strand: GCA ATG CAC
Complementary Strand: CGT TAC GTG
Next, we can transcribe this to find our mRNA. We're going to do the same thing to the complementary DNA strand, but with Uracils instead of Thymines. So our pairs are: (A & U) and (C & G)
Complementary DNA Strand: CGT TAC GTG
mRNA Strand: GCA AUG CAC
You'll notice that the mRNA strand is almost exactly like the new mRNA strand, but with Uracil instead of Thymine.
Each set of three nucleotides is known as a codon, which encodes the amino acids that ribosomes make into proteins. To read the codons, you need to have a chart like the one I attached. Start in the middle and work your way to the edge of the circle. Some amino acids have multiple codons. There are also "stop" and "start" codons that signify the beginning and ends of proteins.
mRNA Strand: GCA AUG CAC
Amino Acids: Ala Met His
Our sequence is alanine, methionine, and histidine.
A frameshift mutation occurs when a nucleotide is either added or removed from the DNA. It causes your reading frame to shift and will mess up every codon past where the mutation was. This is different than a point mutation, where a nucleotide is swapped because that will only mess up the one codon that it happened in. Frameshift mutations are usually more detrimental than point mutations because they cause wider spread damage.
Let's repeat what we did earlier on the mutated strand to see what changed.
Mutated Strand: CAA TGC AC
Complementary Strand: GTT ACG TG
---
Complementary DNA Strand: GTT ACG TG
mRNA Strand: CAA UGC AC
---
mRNA Strand: CAA UGC AC
Amino Acids: Glu Cys X
---
Our amino acid sequence is glutamine, cysteine, and no third amino acid.
As you can see, removing the first nucleotide of the strand caused every codon to change. The last codon is now incomplete and won't be read at all. If this happened in a cell, the protein that was created from this mutated strand would be incorrect and may not function completely or at all.
I need help with this assignment!
learning activity handout: cell respiration summary
Answer:
Cellular respiration is a process that all living things use to convert glucose into energy. Autotrophs (like plants) produce glucose during photosynthesis. Heterotrophs (like humans) ingest other living things to obtain glucose. While the process can seem complex, this page takes you through the key elements of each part of cellular respiration.
Explanation:
hope this helps :)
What happens when a phase in the cell cycle does something incorrectly / doesn't do its required tasks, what happens to the cells that are impacted by those errors and what effect does it have on other cells in the cell cycle?
When a phase in the cell cycle does something incorrectly, mutation occur which leads to cell death or cancer.
What happens when a phase in the cell cycle does something incorrectly?When a phase in the cell cycle does something incorrectly, then they cannot move to opposite poles in the later phases of mitosis, which result the cell with extra chromosomes and a daughter cell with missing chromosomes. These mutations can lead cell death, disease or cancer.
So we can conclude that When a phase in the cell cycle does something incorrectly, mutation occur which leads to cell death or cancer.
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If a population is in Hardy- Weinberg equilibrium, what is happening to that population? A. It is experiencing a shift in population size. B. It is not evolving. C. The population is migrating. D. Individuals are experiencing variations within the species. If a population is in Hardy Weinberg equilibrium , what is happening to that population ? A. It is experiencing a shift in population size . B. It is not evolving . C. The population is migrating . D. Individuals are experiencing variations within the species .
Answer:
Its B
Explanation:
Its not going to EVOLVE
Identify the hormone represented by each letter
Identify the hormone represented by each letter, in this case, the letter A represents the thyroid glands and letter B represents the parathyroid gland.
What does the thyroid do?The thyroid is a butterfly-shaped gland that is located in the anterior part of the neck, hugging the windpipe. The hormones produced by it act on our body and metabolism from our fetal formation to senility.
What is the function of the parathyroid?
The parathyroids are four glands located in the neck, behind the thyroid, whose function is to control the levels of calcium in the blood through the production of parathyroid hormone (PTH).
These two organs have essential functions for the human body responsible for metabolism.
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Suppose an mRNA consists of 60 nucleotides; it directs a primary polypeptide chain containing __________ amino acids to be synthesized.
An mRNA that consists of 60 nucleotides directs a primary polypeptide chain containing 18 amino acids to be synthesized.
What is the genetic code?The genetic code is a series of instructions by which a cell can synthesize proteins through two sequential processes: transcription (mRNA) and translation (protein).
The translation is produced from messenger RNAs (mRNAs), where triples of nucleotides or codons give rise to specific aminoacids.
In conclusion, an mRNA that consists of 60 nucleotides directs a primary polypeptide chain containing 18 amino acids to be synthesized.
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The small dense region within the
nucleus is called...
A. the chloroplast.
B. the nucleolus.
C. the mitochondria.
Answer:
the nucleolus
Explanation:
i gotchu
Consider these versions of The War of the Worlds. Excerpt 1, from H. G. Wells's novel The War of the Worlds: The common round the sand pits was dotted with people, standing like myself in a half-fascinated terror, staring at these creatures, or rather at the heaped gravel at the edge of the pit in which they lay. And then, with a renewed horror, I saw a round, black object bobbing up and down on the edge of the pit. It was the head of the shopman who had fallen in, but showing as a little black object against the hot western sun. Now he got his shoulder and knee up, and again he seemed to slip back until only his head was visible. Suddenly he vanished, and I could have fancied a faint shriek had reached me. Excerpt 2, from Howard E. Koch's script for Orson Welles's radio adaptation: PHILLIPS: Ladies and gentlemen, you've just heard Mr. Wilmuth, owner of the farm where this thing has fallen. I wish I could convey the atmosphere . . . the background of this . . . fantastic scene. Hundreds of cars are parked in a field in back of us. Police are trying to rope off the roadway leading to the farm. But it's no use. They're breaking right through. Cars' headlights throw an enormous spot on the pit where the object's half buried. Some of the more daring souls are now venturing near the edge. Their silhouettes stand out against the metal sheen.
Which statement best describes the similarity between these versions?
A)Both versions impart an urgent tone through a resident’s words.
B)Both versions impart setting details through colorful description.
C)Both versions explain the background of a scientific phenomenon.
D)Both versions use characterization to show the locals' intelligence.
The similarity between the two versions is that both versions impart setting details through colorful description.
What is a setting of an event?The setting of an event or place refers to the overall features or prevailing conditions of a place in which a particular event occurs.
In the two versions of the events occurring, colorful description is used to explain the situation on ground. For example, the first version talks of half-fascinated terror, renewed horror, and a faint shriek which are all colorful words. The second version uses the descriptions; fantastic scene, enormous spot and daring souls.
Therefore, the similarity between the two versions is that both versions impart setting details through colorful description.
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Irregular stream flow which causes swirling of water in a specific area and localized erosion causes a deeper section known as a __________.
Irregular stream flow which causes swirling of water in a specific area and localized erosion causes a deeper section known as a deneduation.
What is deneduation?The processes of erosion, leaching, stripping, and diminishing the mainland as a result of material removal from higher to lower locations such valleys, river valleys, lakes, and oceans with a permanent filling of low lands are together referred to as denudation.
The elevation and relief of landforms and landscapes on Earth's surface by flowing water, ice, wind, and waves.
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All parts of the body must work
together to maintain homeostasis.
Which of these help maintain
homeostasis in the body?
A. chloroplasts
C. central vacuoles
ernational Academy of Science. All Rights Reserved.
B. cell walls
D. organ systems
D. organ systems help maintain homeostasis in the body.
What is homeostasis?Homeostasis is the process by which the body maintains a stable internal environment, despite changes in the external environment. This involves the coordination of various systems and processes within the body, including the circulatory, respiratory, digestive, and nervous systems.
These organ systems work together to maintain homeostasis by regulating various functions, such as maintaining a consistent body temperature, pH balance, and fluid balance.
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The ancestors of elephants inhabited every continent except Antarctica and Australia. But the Asian and African elephants are the only ones to survive. Why?
Options:
A) Dinosaurs killed all other elephant species.
B) Asian and African elephants killed off other species of elephants.
C) Asian and African elephants adapted well to their environments.
Asian and African elephants adapted well to their environments. Thus, the correct option is C.
Environment of Antarctica is not suitable for elephants why?
The world's coldest location is Antarctica. Additionally, it is the windiest and driest. Almost the entire year, the continent is covered in snow. Due to the extremely harsh temperatures and lack of healthy soil, Antarctica is therefore unsuitable for raising elephants and cultivating crops. Elephants eat grass, while the entire continent of Antarctica is covered in snow. In this database, there are currently 25 (8,17) living elephants located in Australia.
Although they can be found in a variety of environments, including deserts, swamps, and highlands in tropical and subtropical areas of Africa and Asia, they are most frequently found in savannas, grasslands, and woodlands.
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On which part of the maintenance cycle do linux administrators spend the most time?
The part of the maintenance cycle the linux administrators spend the most time is monitoring system.
What is monitoring system?
A system monitor is a hardware or software component used to monitor system resources and performance in a computer system.
This computer hardware can be used by administrators to monitor system resources and performance in a computer system.
Thus, the part of the maintenance cycle the linux administrators spend the most time is monitoring system.
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If a muscle fiber were to suddenly and permanently stop producing ATP the fiber would no longer be able to actively transport calcium out of the cytoplasm (sarcoplasm) and the intracellular calcium concentration would rise. You expect what to happen
No muscle contraction will be observed.
What is the effect of calcium concentration on muscle contraction?The concentration of calcium ions in the muscle cells help in contraction and relaxation of muscles fibers.
Release of calcium ions initiate muscle contraction.
Therefore, there will be no contraction of muscle if calcium ions are not transported out from the sarcoplasm.
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How does biodiversity affect ecosystem stability?
A. Not all ecosystems are effected in the same way
B. Biodiversity has no effect on stability
C. More biodiversity increases stability
D. More biodiversity decreases stability
The ecology is absolutely necessary for biodiversity. Ecosystem stability also rises as a result of increased biodiversity.
What do you mean by biodiversity?
The term "biodiversity" is used to describe the variety of species that can be found on earth. It can include things like plants, animals, bacteria, fungi, and microbes. The diversity of life on earth is immense; while many species are still waiting to be discovered, many more have already gone extinct. The ecosystem is composed of every single living thing. It also covers their surrounding environment and how people interact with them.
The ecosystem depends heavily on the various species. Therefore, the ecosystem's ideal balance is impacted when a single species goes extinct or is lost. Plants use the energy from the sun as part of the ecosystem's cycle.
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What structure seals the space between two cells and makes it impermeable?
The structure that seals the space between two cells and makes it impermeable is; Occluding or Tight Junction
What is the Cell Junction?
The correct answer to the question is called Occluding junctions or tight junctions. This is because Occluding junctions in cell structures are junctions that create a watertight seal that is like an impermeable or semipermeable barrier in between adjacent cells to prevent the escape of water or other liquids.
Thus, the structure is called an Occluding junction or tight junction.
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How much ATP is produced from the Kreb Cycle?
According to the research, in the Kreb Cycle two ATP molecules are generated.
What is the Kreb Cycle?It is the set of reactions that generates most of the electron carriers (energy) that will be connected in the electron transport chain.
Two molecules of adenosine triphosphate (ATP) are formed from one glucose molecule (two turns of the cycle).
Therefore, we can conclude that according to the research, in the Kreb Cycle two ATP molecules are generated.
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