The offspring of two heterozygous gray-bodied, normal-winged flies should be 50% gray-bodied/normal wings (BbRr) and 50% black-bodied/vestigial wings (bbrr) because these alleles are linked.If a small number, say 15%, of the offspring are instead black-bodied with normal wings, this is most likely the result of:
A) crossing-over.
B) incomplete dominance.
C) codominance.
D) an error in meiosis.
E) mutation.

Question

Quizplus · Accepted Answer

Crossing-over during meiosis can result in new combinations of alleles, leading to offspring with unexpected phenotypes, such as black-bodied with normal wings.

The Offspring of Two Heterozygous Gray-Bodied, Normal-Winged Flies Should Be