When house mouse adult females are compared with one another on the basis of their fetal intrauterine positions, adult 2M females (female fetuses who had been nestled between two male fetuses), when compared with 0M females (female fetuses who had not been next to a male),
A) are less aggressive to female intruders.
B) are more attractive to males.
C) experience their first estrus at a later age.
D) mark a novel environment at a lower rate.

Question

Quizplus · Accepted Answer

Adult 2M female mice, who were positioned between two male fetuses, are exposed to higher levels of testosterone in utero, which can delay the onset of their first estrus compared to 0M females.

When House Mouse Adult Females Are Compared with One Another