QUESTION 10 Researchers at a health food company decide to breed sunflowers with larger seeds, thinking they might be more popular if people could eat them like pistachios. They choose a set of seeds 4 mm longer than average and grow them to maturity. They cover the flowers so that bees and other pollinators can't reach them and cross pollinate them by hand. When they harvest the seeds of the new plants, they find them to be on average 1 mm longer than the original population mean. What is the heritability of seed length in this experiment? 0 100% O 50% O 25% O 10% O 0% QUESTION 11 The Neutral Theory of Molecular Evolution proposes that Most changes in DNA sequences cause changes in protein sequences. O Evolution of frequencies of alleles tends toward equilibrium values. O Most evolution of DNA sequences occurs by point mutation rather than gene duplication. O Most evolution of DNA sequences occurs by genetic drift rather than by natural selection, O Most evolution of protein sequences occurs by genetic drift rather than by natural selection. QUESTION 12 Which of the following statements about genetic drift is true? Q Genetic drift can change allelic frequencies at a locus in a population in situations where natural selection can't act because there is no variation at that locus. Genetic drift plays a role in determining allelic frequencies in a population in each generation when there is independent assortment of alleles during meiosis. O Genetic drift can play a role in helping a species adapt to its environment through random change of allelic frequencies. O When two populations both have large effective population sizes. genetic drift does not cause them to differentiate. O Genetic drift does not affect allelic frequencies in populations of asexual organisms