The frequency of the dominant allele “A” in an imaginary population is 0.20 (p) and the frequency of the recessive allele “a” in the population is 0.80 (q). What are the PREDICTED/EXPECTED genotype frequencies of all three genotypes (homozygous dominant, heterozygous, and homozygous recessive) if the population is in Hardy-Weinberg equilibrium?

In a population of locusts, the mean wing length is 47 mm, the selection gradient on wing length is β = 0.12/mm, the phenotypic variance for wing length is P = 3.6 mm2, and the heritability of wing length is h2 = 0.27. In addition, we know that the additive genetic covariance between wing and leg length is 0.60 mm2. What is the expected evolutionary change in mean leg length due to selection on both wings and legs? Repeat these calculations to predict what will happen to wing length as a result of the selection on both wings and legs. What do you predict the average wing and leg lengths will be in the next generation?

After completing your pre-class assignments, you should be able to: Recognize how mutation and recombination are the two sources of genetic variation. Determine allelic variation by evaluating results shown on a gel. Define the Hardy-Weinberg Equilibrium. Discuss how the frequencies of alleles dictate the frequencies of genotypes in a population. List the five assumptions of the Hardy-Weinberg Equilibrium. Differentiate between disruptive, directional, and stabilizing selection.

206 enoijasuo dej-1209 5. Colorblind women are rare, but they can be found in the population. Why do we find that red-green colorblindness is so much less common in females than males? 6. In humans, normal skin color is considered to be dominant "C" to albino (the absence of skin color) "c." These genes are not sex-linked. Answer the following questions. a. What is the probability (in percent form) that an albino woman and albino man mate and have offspring that have normal skin coloration? b. An albino man marries a woman with normal skin color, but who had a mom that was albino. What is the probability that their first child will have normal skin color? A

In a  certain  breeding population , it is  known for  certain that  only 7.8% of  the individuals  are "true breeding" for the  dominant phenotype.  What would be  the predicted  frequency of  individuals that are "true-breeding" for the recessive phenotype?

Consider a Hardy-Weinburg Equilibrium population with an autosomal locus of 2 alleles, A1 and A2. If P(A1A2) = 8 * P(A1A1), what are the allele frequencies at the locus?

Eye color in a species of fruitfly is determined by a single locus with two alleles:  E and e. EE individuals have red eyes, Ee have pink eyes, and ee individuals have brown eyes. In a lab population that is in Hardy–Weinberg equilibrium, we count 27 flies with brown eyes out of 164. How many flies can you expect to have red eyes?  Round your answer to the closest integer value.

There are two existing hypotheses for an unusually high frequency of a deleterious recessive allele in a certain population other than it is hidden in the heterozygous genotype and not exposed to selection.  Explain what these two likely hypotheses are and how you could distinguish between them based on your understanding of the applicable assumptions that are part of the Hardy-Weinberg Equilibrium Model

A population of 40 asters segregating at two loci with two alleles each (A/T and G/C) has 8 individuals with the AAGGgenotype. The allele frequencies of A and G are 0.5 and 0.5 in the population.   What is the coefficient of gametic disequilibrium, D?   What is the value of Lewontin’s D’? (that is “D prime”)

Suppose the frequency of the recessive allele a for the recessive condition albinism is 0.2 Assume the Hardy-Weinberg distribution.    What is the frequency of albinism in the general population?  What fraction of the population are carriers?