In Drosophila, the dominant allele Cy (Curly) results in curly wings. The cross Cy/ x Cy/ (where represents the wildtype allele

Question

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In Drosophila, the dominant allele Cy (Curly) results in curly wings. The cross Cy/ x Cy/ (where represents the wildtype allele

of Cy) results in a ratio of 2 curly : 1 wildtype F1 progeny. The cross between the curly F1 progeny also gives a ratio of 2 curly : 1 wildtype F2 progeny. How can this result best be explained

Biology

1 answer:

blagie [28] · Answer 1 · 2022-07-07T15:04:13+03:00

Answer:

d

Explanation:

Using a Punnet square to represent the given information

The cross between Cy + and Cy + can be computed as:

Cy +

Cy Cy Cy Cy +

+ Cy + ++

From what we see above, it is above that the ratio of Curly to wildtype is in the ratio of 2:1

This illustrates that the genotype Cy Cy is lethal. This is explained when two curly F1 are crossed which resulted in the same ratio.

Hence, the inheritance of Cy/Cy is fatal.