Peahens prefer to mate with peacocks that have the brightest and largest tail displays.The peacock's tail is a disadvantage to the males,because it is large and cumbersome and hinders them from escaping from predators.Given these facts,why isn't the peacock's tail selected against by natural selection?
A)peacocks lack the mutations to allow selection to work
B)only a few peacocks have large tail displays
C)in spite of the disadvantage, peacocks with larger tails leave more offspring
D)it is selected against, but because a peahen gives birth to so many males, the population is not greatly affected
E)peacocks do not reproduce sexually

Question

Peahens prefer to mate with peacocks that have the brightest and largest tail displays.The peacock's tail is a disadvantage to the males,because it is large and cumbersome and hinders them from escaping from predators.Given these facts,why isn't the peacock's tail selected against by natural selection?  
A)peacocks lack the mutations to allow selection to work
B)only a few peacocks have large tail displays
C)in spite of the disadvantage, peacocks with larger tails leave more offspring
D)it is selected against, but because a peahen gives birth to so many males, the population is not greatly affected
E)peacocks do not reproduce sexually

Quizplus · Accepted Answer

Despite the disadvantage of being large and cumbersome, peacocks with larger and brighter tail displays are preferred by peahens as mates. Therefore, they leave more offspring and their genes for bright and large tail displays are passed on to their offspring. This results in the positive selection for the peacock's tail displays.

Peahens Prefer to Mate with Peacocks That Have the Brightest