Blog

right 

back

Mammals are going extinct at a much faster rate in the past 150 years than occurs naturally.

The figure shows three mouse populations and their associated changes in the frequency of B, the allele for dark fur. The recessive b allele codes for white fur. After 20 generations, in which population would you be most likely to encounter a white mouse?

In a species of deer, males use their antlers to challenge each other in fights for territory and females. The females deer of this species actively choose to mate with the winners of these fights, which tend to be strong males with large antlers. What type of selection does this scenario describe? Select all that apply. 

Based on how “rare” is defined, a species could be considered common if, and only if, it had a high population size, large geographic range, and occurred in broad range of habitats.

Which one of the following statements about random genetic drift is incorrect?

Stabilizing selection favors ________, while diversifying selection favors ______________.

The percentage of individuals exhibiting a recessive disease in a Hardy Weinberg population is 0.04, which is 4%. Based on a Hardy Weinberg equilibrium, what percentage of individuals would be expected to be heterozygous carriers?

Match the type of nonrandom mating (i, ii, or iii) with the appropriate description (a, b, or c). i) inbreedingii) assortativeiii) disassortative   a)  preferential mating of similar phenotypesb)  preferential mating of dissimilar phenotypesc)  preferential mating of genetically related individuals