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Q1. In the wild, male house finches (Carpodus mexicanus) vary considerably in an amount of red pigmentation in their head and throat feathers, with colours ranging from pale yellow to bright red. These colours come from carotenoid pigments that are found in the birds' diets; no vertebrates are known to synthesize carotenoid pigments. Therefore, the brighter red the male's feathers are, the more successful he has been at acquiring the red carotenoid pigment by his food-gathering efforts (all other factors being equal).
Throughout breeding season, one should expect female house finches to prefer to mate with males with the brightest red feathers. Which is most completely describes the sort of evolutionary change that will occur in this situation?
Q2. Tony sometimes seems very "wound up." At those times, he seems full of energy, talks very rapidly, and makes very grandiose plans. (One time, he gave away all of his belongings and was planning to move to Washington, D.C., so he might advise the President.) At these times, he also seems to need almost no sleep. All through other periods of time, Tony seems very "down." throughout these times he does not take care of himself. He seems to want to sleep all the time, and he often makes thinly veiled references to wanting to commit suicide.
The Neurospora cross was made between a strains that carried mating type A and mutant allele arg-1(arg) and another strain the carried mating-type a and the wild type arg-1 (+) gene. Four hundred linear octads were isolated and they fell into the 7 c..
How a biologist would explain how ability to run fast evolved in cheetahs, assume their ancestors would only run 20 miles per hour. How various total depurinations in your body each day.
Ralph is taking scuba diving classes, and is warned not to hold his breath as ascending from depth but to continuously release air from his mouth. What is the basis of this instruction and what is risk if it is ignored.
What is the most common agent of UTIs . The pool regularly becomes infested with disease-causing viruses and bacteria. Which species are more possible to thrive in the changing environment.
What are the benefits of genetic engineering versus the potential risks. Critics claimed that the experiment was inconclusive. Which of the criticisms would be addressed by using a swan-necked flask in its place of the unsealed flask.
What are the underlying mechanisms that help assist a species to originate using sympatric speciation although they are not reproductively isolated like in allopatric speciation.Diversity within species that is using sympatric speciation.
What are some potential research questions that would be interesting to ask of the species prepare a hypothesis and an experiment to test your hypothesis.
Assume that there are 63 different naturally occurring amino acids. If all 64 possible combinations of bases for a codon resulted in coding for 63 different amino acids and one stop codon, which of the next mutations would NOT be possible.
What combination(s) of chromosomes are possible in haploid cells following both divisions of meiosis? (Hint: remember independent assortment). A diploid cell contains three pairs of homologous chromosomes designated C1 and C2, M1 and M2, and S1 and S..
Which is likely explains the genetic uniqueness of this population. Following accident and reconstructive surgery, he noted that his left lower eyelid was still drooping and the corner of his mouth sagged. What nerve damage did he maintain.
The membrane vesicles are next washed, the membranes solubilized and the proteins denatured and analyzed by SDS gel electrophoresis and Western blotting using polyclonal antibodies against glycophorin A, an erythrocyte plasma membrane protein.
What fraction of offspring of the cross AabbDd x AaBbdd are expected to have the same phenotype as either one of their parents assume that all three genes are on different chromosomes.
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