17a. Assuming that both types of pom-poms are present in the population, what do you think would happen to the pom-pom population if the black forest experienced a prolonged drought so all the trees died and the habitat became red grassland? 17b. Next, think about an alternative scenario. Suppose that natural selection over many generations had eliminated all the red pom-poms in the black forest habitat so only black pom- poms survived. After that, a prolonged drought resulted in this habitat turning into a red grassland. Would natural selection for pom-pom color occur? Why or why not? 17c. The above scenarios are showing that in order for natural selection to occur must exist within a trait.

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?

9. Two lizard populations were found on opposite sides of a mountain. On a particular gene A, the following genotypes (together with the corresponding frequencies) were observed: AA Aa aa Population 1 38 Population 2 0 44 18 80 20 a. Calculate the frequencies of A and a in the two populations. а. b. Calculate and establish if either of the two populations appear to be at Hardy-Weinberg equilibrium. c. A huge flood opened a canyon in the mountain previously separating population 1 and 2. They were then able to migrate such that the two populations mixed completely and mated at random. Determine the genotype frequency of the next generation of the new combined population.

59)The figure below shows the shell length in two random, and representative samples of mussels from the same species. The samples were obtained from the same population but two years apart. Knowing that this species of mussel can live for over a decade, which statement is consistent with the data? The population experiences random genetic drift   The population experienced purifying selection   The population evolved to be shorter   The population is undergoing inbreeding depression   The population experienced directional selection

1.  What is the function of melanin in humans? What is the function of melanin in other species? 2.  According to the film, why is there a lack of diversity in the MC1R allele among African populations?  3.  According to the film, why was dark skin selected for regions close to the equator?  4.  Describe the selective pressure favoring light skin in regions far from the equator.  5.  Which human populations living in which environments are most at risk for rickets today and why?

60)The figure below shows the average horn size of male big horn sheep in Alberta over a period of 35 years. This population is subject to a legal trophy hunt. Given the available information, what would be the most reasonable evolutionary hypothesis explaining the observed trend? Trophy hunting caused stabilizing selection.   Trophy hunting caused disruptive selection.   Trophy hunting caused frequency dependent selection.   Trophy hunting caused directional selection.

24. In a toad population, green toads produce 4 offspring over their lifetime, brown toads produce 2.5 offspring, and gray toads produce 6 offspring. What are the relative fitnesses of these phenotypes (in the order green, brown, gray)? Group of answer choices 1, 0.42, 0.67 0.33, 1, 0.67 0.67, 0.42, 1 0.67, 0.33, 1 1, 0.33, 0.67