BIO 322- Exam 2 Practice Questions and Correct Answers| 100% Verified

If selection is only strong enough to overcome the random effects of genetic drift when Ne s >> 1, how large a selection coefficient s is needed for a beneficial new mutation to reliably evolve to higher frequency in a typical human population? Ne in human population: 10,000 |s| > 1/Ne |s| > 1/10,000 |s| > 0.0001 A selection coefficient of 0.0001 would be needed. Consider the following descriptions of genetic loci, and predict what dN/dS ratio you would expect to see for each one in a comparison between a human and a mouse. A gene coding for one of the subunits of a ribosome. dN/dS < 1 A noncoding region of DNA. dN/dS = 0 A gene coding for a protein involved in color vision. dN/dS > 1 A gene coding for a protein involved in olfactory (smell) sensitivity. dN/dS > 1 A gene coding for a protein involved in cellular respiration. dN/dS < 1 Rank the following species in terms of the effective population size you might expect them to have. -Elephants, which have few very large offspring. Smaller effective population size -Mice, which have many offspring. Larger effective population size -Social bees, who live in hives in which only a few individuals reproduce. Smaller effective population size -Pine trees, which mate via wind-dispersed pollen that can reach hundreds of other trees. Larger effective population size