Question

You perform an artificial selection breeding experiment starting from two outbred strains of ducks, and selecting for individuals with the highest rate of egg production at each generation. You find this rate increases with each generation for 15 generations, but thereafter it levels off/plateaus at some “maximum” value. Provide two or more reasons for why the egg production rate stopped increasing with generation beyond this upper limit.

Answer 1

# This condition is called as outbreeding depression. Mating between individuals from different popoulations is called as outbreeding. Decline in the survival and reproductive success is called as outbreeding depression. After certain generation the individuals stops to reproduce.