Which of the following statements is true regarding Drosophila?
A) The ratio of autosomes to fly Y and X chromosomes determines fly sex.
B) The Y chromosome plays no role on fly sex determination but does contain genes for fly reproduction.
C) The Y chromosome determines male flies.
D) The Y chromosome plays no role in fly sex determination or fly reproduction.
E) The ratio of X to Y chromosomes determines fly sex.
Answer: B
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