9PopGen Problem Set

9PopGen Problem Set - Use both a Punnett square and the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Heredity (BIOL 303) Population Genetics Problem Set 1. In a population of 2000 gaboon vipers, a genetic difference with respect to venom exists at a single locus. The alleles are incompletely dominant. The population shows 100 individuals homozygous for the t allele (genotype t/t, non-venomous), 800 heterozygous (genotype T/t, mildly venomous), and 1,100 homozygous for the T allele (genotype T/T, lethally venomous). a) What is the frequency of allele T? b) What is the frequency of allele t? c) Are the genotypes in Hardy-Weinberg equilibrium? What must you do to answer this question? Hine: chi-square analysis. 2. Let ‘A’ and ‘a’ represent alleles whose respective frequencies are p and q.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Use both a Punnett square and the formula p 2 + 2pq + q 2 = 1 to solve the questions below. a) If p is 0.16, what would be the frequency of heterozygotes if the population were in H-W equilibrium? b) If 50% of the individuals have recessive phenotypes, what would be the frequency of heterozygotes if the population were in H-W equilibrium? Hint: what genotype would individuals with recessive phenotypes have? Then apply your knowledge of algebra. c) How is heterozygosity affected by allele frequencies? Try calculating heterozygosity for scenarios with different allelic frequencies (p=0.1, p=0.3, p=0.5 p=0.8 for example) and compare heterozygosity values for each)....
View Full Document

Ask a homework question - tutors are online