Q5.3. Someone has handed you the following graph of changes in the frequency of one allele in a population over time. Based on the graph and without any other information, which of the following is most likely true? Allele Frequency 1.0 0.75 - 0.50 0.25- 0.0 0.00 10 Time (generation) 20 The allele does not offer any fitness advantage and the population is small. The allele does not offer any fitness advantage and the population is large. The allele offers a selective advantage and the population is small. The allele was introduced at a very low frequency and the population is large. 30

What is the average heterozygosity for population 2?   Population 1 Population 2   Heterozygosity No. of alleles Heterozygosity No. of alleles Gene 1 0.14 4 0.32 6 Gene 2 0.09 2 0.37 12 Gene 3 0.11 3 0.24 7 Gene 4 0.21 3 0.33 9 Gene 5 0.00 1 0.36 7 Gene 6 0.34 5 0.32 6 Gene 7 0.00 1 0.31 8

Assume that a population starts with the frequency of R of 0.3.  It then undergoes 3 generations of complete selection against the homozygous recessives. 1. What would you expect the frequency of the recessive allele to be after this period of selection? 2. How many white flowers would you expect?

Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations.   Fitness   CC CM MM Population 1 1.0 1.0 0.6 Population 2 0.9 0.9 1.0  Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Which of the following statements is true based on the information you have on these populations?