ASU BIO 345 Exam 1| Questions and answers 2023/24 | GRADED A+

ASU BIO 345 Exam 1| Questions and answers 2023/24 | GRADED A+ D ≈ 0.49 A population of butterflies comes in three color morphs; orange (A1A1), black (A2A2), or orange with black spots (A1A2). You find that the frequency of orange butterflies is 0.49, and the frequency of black butterflies is 0.36. You do not know if the population is currently in HWE. What would you expect the frequency of spotted butterflies to be, if the population is under Hardy-Weinberg equilibrium? A ≈ 0.42 B ≈ 0.15 C ≈ 0.84 D ≈ 0.49 B. Migration is low and the population with adaptive traits is large Gene swamping is least likely when A. Selection is low and migration is high B. Migration is low and the population with adaptive traits is large C. Selection is high and migration is high D. Migration is low and the population with adaptive traits is small False Genetic drift causes polymorphism to build up between populations, mostly between coding regions of the genome. True False D. Disruptive A species of flower can produce a shape that is either suited to pollination by butterflies or bumblebees. Heterozygotes have an intermediate shape and are poorly pollinated by both. What kind of selection is likely occurring in this population? A. Directional B. Stabilizing C. Correlated D. Disruptive True The Hardy-Weinberg equilibrium equation is a null hypothesis True False C. No mutation is occurring at this locus Which of the following conditions must be met for alleles at a locus to stay in Hardy-Weinberg equilibrium (HWE)? A. There is low gene flow from neighboring populations B. The population size is small C. No mutation is occurring at this locus D. The alleles are undergoing stabilizing selection E. Females prefer males that are homozygous recessive for an allele True Natural selection can act on non-inherited features of the phenotype True False False A founder event populates a small nearby island with a new species of lizard. This lizard comes in two color morphs controlled by alleles D1 and D2, giving it blue spots or green spots. Neither color gives a fitness advantage. The two color morphs will likely stay in HWE. True False A. Allowing an allele that confers better fitness to spread more quickly than it would through only natural selection Genetic drift can work against natural selection, but it can also help it by: A. Allowing an allele that confers better fitness to spread more quickly than it would through only natural selection B. Genetic drift only works against natural selection C. Causing adaptive changes D. Increasing migration B. The female must be able to see the blue color under the fur Some males in a population of wild dogs have blue skin. What must necessarily be true for the trait to evolve under sexual selection though female choice? A. The trait must be enhanced in males that are best at providing food for their young B. The female must be able to see the blue color under the fur C. The trait must help the male hide from predators D. The trait must help the male protect its territory from other males B. ≈690 A population of fish has two alleles for fin color, O (orange) or o (blue). The o allele is recessive. If there are 30 homozygous (OO) orange-finned fish in a population of 1,000, how many have blue fins? Assume the population is at Hardy-Weinberg equilibrium. A. ≈170 B. ≈690 C. ≈830 D. ≈282 True A deleterious mutation is more likely to go to fixation in a small rather than large population True False B. FST would be near 0, the populations are likely genetically similar FST is a measure of genetic divergence between populations. If there are one or more migrants between populations per generation, and selection is not affecting the populations differently, what would you expect in terms of FST and genetic divergence?