Four eye-color mutants in Drosophila — apricot, brown, carnation, and purple —

Cross	Parents	F1 Progeny
Female	Male	Female	Male
A	Apricot	Red	Red	Apricot
B	Brown	Red	Red	Red
C	Red	Purple	Red	Red
D	Red	Apricot	Red	Red
E	Carnation	Red	Red	Carnation
F	Purple	Red	Red	Red
G	Red	Brown	Red	Red
H	Red	Carnation	Red	Red

Four eye-color mutants in 
Drosophila — apricot, brown, carnation, and purple — are inherited as recessive traits. Red is the dominant wild-type color of fruit-fly eyes. Eight crosses (A to H) are made between parents from pure-breeding lines. The results are shown in the table.

Part A

Which of these eye-color mutants are X-linked recessive?

Check all that apply.

Part B

Which of these eye-color mutants are autosomal recessive?

Check all that apply.

Part C

Predict F2 phenotype ratios of cross C.

Part D

Predict F2 phenotype ratios of cross B.

Part E

Predict F2 phenotype ratios of cross D.

Part F

Predict F2 phenotype ratios of cross G.

 

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