Fruit flies are either "rovers" that move rapidly over a surface looking for food or "sitters" that move slowly over a surface.When a rover and a sitter are mated,all of the offspring are rovers.When two of these offspring are mated,75 percent of the offspring are rovers and 25 percent of the offspring are sitters.This suggests that
A) fruit flies are very efficient at learning how to forage food from their parents.
B) food-foraging behavior in fruit flies is regulated by a gene.
C) food foraging is an imprinted behavior.
D) food foraging is a form of communication.

Question

Quizplus · Accepted Answer

The fact that all offspring from a rover-sitter mating are rovers, and that the proportion of rovers in the offspring of two rovers is consistently 75%, suggests that food-foraging behavior in fruit flies is determined by a single gene that is inherited from both parents in a predictable manner. This is known as a Mendelian pattern of inheritance, and is characteristic of traits that are determined by a single gene.

Fruit Flies Are Either "Rovers" That Move Rapidly Over a Surface