In fruit flies, natural selection tends to maintain both the rover and sitter alleles of the foraging gene because ____.

A) gametes assort randomly
B) larvae of each foraging type are more likely to survive when their type is rare
C) larvae of each foraging type are more likely to survive when their type is common
D) rovers often find more food than sitters
E) sitters conserve more energy than rovers

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ingabure belise · Accepted Answer

Final Answer : B, Explanation :  Larvae of each foraging type (rover and sitter) are more likely to survive when their type is rare due to frequency-dependent selection. This form of natural selection maintains genetic variation within a population by giving a survival advantage to rare phenotypes, thus preventing any single allele from becoming fixed.

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