In Fruit Flies,bar Eye Is Inherited by an X-Linked Allele

question 51

Multiple Choice

In fruit flies,bar eye is inherited by an X-linked allele (B for bar) .If a heterozygous bar-eyed female is mated to a non-bar-eyed male,what will be the expected ratio of phenotype given four offspring?

• A)two bar-eyed females,two bar-eyed males
• B)one bar-eyed and one non-bar-eyed female,one bar-eyed and one non-bar-eyed male
• C)three bar-eyed females and one non-bar-eyed male
• D)bar-eyed females only
• E)non-bar-eyed males only

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