A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight)wings.The F₁ mate with each other to produce an F₂ generation that consists of 160 flies with curled wings and 80 with straight wings.What can you infer from this observation? A)Curled wings is a recessive trait. B)The dominant curled wing allele is also a recessive lethal. C)Wing shape is controlled by two codominant alleles. D)Two interacting genes determine wing shape. E)All of the hybrid F₁ flies had straight wings.

Question

Quizplus · Accepted Answer

The 2:1 ratio in the F2 generation suggests that the dominant curled wing allele is also a recessive lethal, causing death when homozygous.

A Pure-Breeding Fruit Fly with Curled Wings Mates with a Pure-Breeding