Unisexual Whiptail Lizards Exhibit Male-Like Courtship Behavior When

Question

Unisexual whiptail lizards exhibit male-like courtship behavior when:
A) their ovaries are enlarged.
B) their endogenous estrogen levels are high.
C) their endogenous testosterone levels are high.
D) their endogenous progesterone levels are high.
E) All of the above

Accepted Answer

Unisexual whiptail lizards do not produce detectable levels of testosterone. When their estrogen levels are high, their ovaries enlarge, and they exhibit female-like behavior. When their estrogen levels drop and progesterone levels rise after ovulation, their ovaries shrink, and they exhibit male-like mounting behavior.