Four eye-color mutants in Drosophila

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.
You

Check all that apply.

brown

carnation

apricot

purple

 

Part B
Which of these eye-color mutants are autosomal recessive?
Check all that apply.
 

Check all that apply.

carnation

purple

brown

apricot

 

Part C
Predict F2 phenotype ratios of cross C.
 

Predict  phenotype ratios of cross .

Females are 11 red. Males are 12 red, 12 purple.

Females are 34 red, 14 purple. Males are 34 red, 14 purple.

Females are 14 red, 34 purple. Males are 12 red, 12 purple.

None of the above.

 

Part D
Predict F2 phenotype ratios of cross B.
 

Predict  phenotype ratios of cross .

Females are 12 red, 12 apricot. Males are 12 red, 12 apricot.

Females are 34 red, 14 brown. Males are 34 red, 14 brown.

Females are34 red, 14 apricot. Males are 34 red, 14apricot.

None of the above.

 

Part E
Predict F2 phenotype ratios of cross D.
 

Predict  phenotype ratios of cross .

Females are 12 red, 12 apricot. Males are 12 red, 12 apricot.

Females are 12 red, 12 apricot. Males are 12 red, 12 apricot.

Females are 11 red. Males are 12 red, 12 apricot.

None of the above.

 

Part F
Predict F2 phenotype ratios of cross G.
 

Predict  phenotype ratios of cross .

Females are11red. Males are 12 red, 12 apricot.

Females are 12 red, 12 apricot. Males are 12 red, 12 apricot.

Females are 34 red, 14 brown. Males are 34 red, 14 brown.

None of the above.

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