Question Description
| 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.
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
OR
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