25. In a classic study of the Hopi, a Native American tribe of central Arizona,

Question

25. In a classic study of the Hopi, a Native American tribe of central Arizona, Woolf and Dukepno (1959) found 26 albino individuals in a total population of 6000. A single gene with two alleles causes this form of albinism. What more do we need to know to be able to compute the allele frequencies for this gene? a. Nothing, I'm ready to compute it right now. b. Whether albinism is caused by a loss of function mutation c. Whether the population is in Hardy-Weinberg equilibrium d. The phenotype of the heterozygote e. We must know both b and c 26. Mutations in the GDF9 gene in sheep have been linked to changes in female fecundity. The following are the relative fitnesses of different genotypes in the population Relative fitness 0.7 0.1 (a) this is an example of negative frequency-dependent selection: genetic variation will be lost over time this is an example heterozygote advantage; genetic variation will be maintained over time (c) this is an example of negative frequency-dependent selection: genetic variation will be maintained over time (d)this is an example of heterozygote advantage; genetic variation will be lost over ime

Explanation / Answer

25. c-

We need to know that the population is in Hardy Weinberg equilibrium or not; if it is then we can calculate the frequency of the alleles.

26. b

This is heterozygote advantage/ superiority: the heterozygote has certain advantage over the homozygotes. The genetic variation will be maintained as both the alleles are present in the population.

32. a

All other factors can result in the prevention of the fixaton of the positively selected allele.

33.d

All of the above

11. The answer depends on the mating characteristics of the ferrets. If they are polygamous in nature, then an increase in female population will lead to increase in population size. If not, then change in population is unpredictable.

a/ d

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.