PLSC 631 - Intermediate Genetics

Populaton Genetics Quiz

2. RFLP mapping at a specific locus in cattle demonstrated that two alleles were present. One allele (A1) represents a 2.5 kb band and the second allele (A2) represents a 4.0 kb band. A herd of cattle was screened, and 384 were scored as genotype A1A1, 210 were genotype A1A2 and 260 were A2A2. What are the allelic frequencies of A1 and A2 in this herd?

3. Below are ten populations and the proportion of each genotype in eachpopulation. (5 pt)

Population	AA	Aa	aa
1	1.0	0.0	0.0
2	0.0	0.5	0.0
3	0.0	1.0	0.0
4	0.5	0.25	0.25
5	0.25	0.25	0.5
6	0.25	0.5	0.25
7	0.33	0.33	0.33
8	0.04	0.32	0.64
9	0.64	0.32	0.4
10	0.986049	0.0132902	0.000049

a. Which populations are in Hardy-Weinberg equilibrium?

b. What are the allelic frequencies for the A and a alleles in each population.

4. Plants with the genotype SS and Ss yield 500 seeds per plant in a specific population. ss individuals yield 350 seeds per plant. If the frequency of the s allele is 0.9, what is the mean number of seeds produced per plant in this population.