Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?

#Question id: 3385

#Unit 11. Evolution and Behavior

What is the effect of inbreeding; in a population assume no other evolutionary forces are present?

a. Allelic frequencies change.

b. There will be more heterozygotes than predicted by the Hardy-Weinberg law.

c. There will be fewer heterozygotes than predicted by the Hardy-Weinberg law.

d. Genotypic frequencies will equal those predicted by the Hardy-Weinberg law.

#Question id: 3386

#Unit 11. Evolution and Behavior

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of homology?

a) Dogs and wolves have very similar morphologies.

b) Convergent evolution has occurred.

c) Dogs and wolves not shared more recent common ancestor

d) Dogs and wolves shared a more recent common ancestor

#Question id: 3387

#Unit 11. Evolution and Behavior

Observe the following hypothetical populations Which of these populations, if any, is in Hardy-Weinberg equilibrium

#Question id: 3388

#Unit 11. Evolution and Behavior

This graphical presentation emphasizes following important consequences of the Hardy-Weinberg principle.

 a. The frequency of heterozygous is highest when p equal to q

b. Rare alleles are found primarily in heterozygotes

c. This frequency distribution will not change from generation to generation once a population is in Hardy-Weinberg equilibrium

d. The equal distribution of genotypes when p equal to q

Which of the following is correct?

#Question id: 3389

#Unit 11. Evolution and Behavior

In the first row of the table above, we record the initial genotypic frequencies before selection has acted. If mating has been random (an assumption of the model), the genotypes will have the Hardy–Weinberg equilibrium frequencies of p2, 2pq, and q2) In the second row of the table above, fitness values of the corresponding genotypes. In the third row the proportion of the population represented by each genotype after selection is obtained by multiplying the initial genotypic frequency times its fitness. The frequency of A allele after selection will be

#Question id: 3390

#Unit 11. Evolution and Behavior

The average numbers of offspring produced by three genotypes are: GG = 60; Gg = 30, gg = 20. What is the selection coefficient of gg?