[Campbell Biology P.1197] Regarding the forager for gene in Drosophila larvae, what is the pr... | Practice Question

Regarding the forager for gene in Drosophila larvae, what is the primary distinction between the for^R "Rover" and for^S "sitter" alleles?

  • A: `for^R` larvae travel nearly twice as far while foraging as `for^S` larvae.
  • B: `for^S` larvae are more effective at recognizing food items than `for^R` larvae.
  • C: `for^R` is associated with a sedentary foraging strategy, while `for^S` involves extensive travel.
  • D: The `forager` gene primarily influences diet selection, not travel distance.

Explanation

The text states: 'On average, larvae carrying the for^R “Rover” allele travel nearly twice as far while foraging as do larvae with the for^S “sitter” allele.' This directly supports option A.