When the most highly aggressive female mice are bred with random male mice,and for each generation only the highly aggressive female mice are selected to breed,what happens to these selected female mice over successive generations?
A) The highly aggressive female mice become more and more aggressive in each new generation.
B) The effect of aggression in female mice is negated by the random effect of the male mice.
C) The highly aggressive female mice eventually die out because of stress-related reactions.
D) The male mice become extremely hostile and aggressive in order to stay alive.

Question

Quizplus · Accepted Answer

Selecting only highly aggressive female mice for breeding will lead to increased prevalence of aggressive traits in each new generation. This is due to the fact that aggression has a genetic basis and is heritable. Thus, the offspring of highly aggressive females will also inherit these traits and exhibit higher levels of aggression.

When the Most Highly Aggressive Female Mice Are Bred with Random