You discover a new mutation in Drosophila that causes an abnormal wing shape. When a male fly with this mutation is crossed to a homozygous normal female, the F1 are all wild-type phenotypically. The F2 flies consist of 1/2 phenotypically normal females, 1/4 phenotypically normal males, and 1/4 males with abnormal wings. What is the MOST likely explanation for the new mutant allele?

A. It is Y linked.
B. It is X linked and recessive.
C. It is X linked and dominant.
D. It is autosomal and recessive.
E. It is autosomal and dominant.


Ans: B. It is X linked and recessive.

Biology & Microbiology

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