In a cross between a female Drosophila from a stock that breeds true for blue ey
ID: 226899 • Letter: I
Question
In a cross between a female Drosophila from a stock that breeds true for blue eyes and a male from a true-breeding wild-type red-eyed stock, all of the offspring have wild-type red eyes. Which of the following can you conclude? [2 pt; L3; II.C]
The allele for blue eye color is dominant.
The gene for eye color is autosomal.
The gene for eye color is sex-linked.
None of the above.
The allele for blue eye color is dominant.
The gene for eye color is autosomal.
The gene for eye color is sex-linked.
None of the above.
Explanation / Answer
Answer - None of the above. (Explained as below)
Had blue eye color been dominant on eof the offsprings would have been Blue-eyed and since nothing is told about sex of the offsprings we cannot conclude whether the eye color is sex-linked or autosomal. So, the answer is none of the above.