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

question 8

Multiple Choice

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.

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Definitions:

Multiple Nuclei

A condition where a cell contains more than one nucleus, common in certain types of muscle cells and some fungal species.

Micronucleus

One or more smaller nuclei found, along with the macronucleus, in ciliates. The micronucleus is involved in sexual reproduction. Compare with macronucleus.

Macronucleus

A large nucleus found, along with one or several micronuclei, in ciliates. The macronucleus regulates metabolism and growth. Compare with micronucleus.

Ciliates

A group of protozoans characterized by the presence of hair-like structures called cilia, used for movement and feeding.