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In Drosophila, allelic series of gene w+ determine the color of an eye. w+ determines red color (wild type), we determines eosin color and wa - apricot color. The allelic realtions are w+ > we > wa > w.
A fly with eosin eyes was crossed with a fly with apricot eyes. Write down the cross showing the genotypes for P. F1, F2 and a ratio observed in F2.
Red blood cells discovered in the plasma of mammals do not contain a nucleus. List all the possible benefits and limitations imposed on these cells by not having a nucleus.
Which of the following are secondary sex characteristics in females?
Describe the four adhesion steps that leukocytes undergo in order to accumulate in a blood vessel.
A population of mice can have either black (B) or white (b) fur and long (L) or short (l) tails. Suppose if this is the gamete pool for the parental generation, what is the expected frequency of B/l:b/l zygotes in the next generation,
A analyzer measured BMI in 12 patients who are free of diabetes and participating in a study of risk factors for obesity and found a mean BMI of 31.7 with a standard deviation of 5.9.
What are the building blocks that make up our genes? What are the three components of the building block?
Describe the common pattern of alternating extinctions and radiations. Consider Wilson's statement. What evidence can you find to support or refute that statement? Do you agree with Wilson? Explain why you do or don't agree and present the evidenc..
What is the major morphological difference between mammalian red blood cells and avian red blood cells? Describe what is happening in plasmolysis when onion cells are placed in a hypertonic solution. Sketch a plasmolysed cell.
At a talk by a visiting scientist, you learn about a strain of bakers' yeast that contains a mutation called gal1- in its galactokinase gene. Because this gene is needed to metabolize galactose, the mutant strain cannot grow in galactose medium.
You have an F- strain of E. coli that is resistant to strepto- mycin (Str(r)) but requires the following amino acids for growth on minimal medium: arginine, cysteine, methionine, phenylala- nine, and proline.
Assume you are a population geneticist, studying a particular disease which is inherited as an autosomal recessive trait. In the population you are studying, the incidence of the disease is three percent.
What is a polar molecule? Hydrogen bonding? Describe the high surface tension of water. How is this related to the proper function of the pleural serous membranes.
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