In fruit flies, red eyes are dominant to green eyes. In a cross between a short-winged, green-eyed fly and a long-winged, red-eyed fly, the results were as follows:

- 40 percent short-winged and red-eyed
- 10 percent short-winged and green-eyed
- 10 percent long-winged and red-eyed
- 40 percent long-winged and green-eyed

Which of the following reflects the chromosome makeup of the parents?

A. LlRr × Llrr
B. Llrr × llrr
C. LlRr × llrr
D. LLRR × llrr
E. LlRR × llRr

C) because the first fly has all recessive traits and so it would be llrr and the second fly has to have at least 1 dominant allele for the wings (Ll or LL) and for the eye color (Rr or RR) so c would be your best answer

Answered by Brycesm9 | 2024-06-10

The best choice for the chromosome makeup of the parents in the cross is C: LlRr × llrr. This combination explains the observed offspring results, yielding the expected ratios of eye color and wing shape. It allows for both dominant and recessive traits to be expressed in the offspring.
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Answered by Brycesm9 | 2024-12-23