Mutations that increase the risk of breast cancer in women are also associated with higher rates of childbirth. This is an example of

A) antagonistic pleiotropy.
B) antigenic shift.
C) balancing selection.
D) thrifty genotypes.

Antagonistic Pleiotropy

A situation where a single gene controls for more than one trait, where at least one of these traits is beneficial to the organism's fitness and at least one is detrimental.

Childbirth

The process of delivering a baby from the uterus to the outside world.

Breast Cancer

A malignant tumor that develops from breast cells, being one of the most common cancers affecting women worldwide.