Drosophila Females' Receptivity to Courtship is Inhibited By

Question

Drosophila females' receptivity to courtship is inhibited by: A) activity in the neurons equivalent to those that express Fru^M in males. B) sex peptide transferred in seminal fluid during copulation. C) activity in sensory neurons in the uterus. D) All of the above E) None of the above

Accepted Answer

In the absence of sex peptide, Fru sensory neurons in the uterus are active, and receptivity is high. After mating, sex peptide transferred from the male to the female inhibits the activity of these sensory neurons and reduces female receptivity.