HEREDITY
LINKED GENES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What was the result of breeding a white-eye fly and a red-eye fly?
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All of the offspring had white eyes.
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All of the offspring had red eyes.
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All of the offspring were male.
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all females are red eyed while all males are white eyed
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Explanation:
Detailed explanation-1: -The cross of white eyed female with red eyed male gives red eyed females and white eyed males. Rarely this cross may give all white eyed females and red eyed males. This results from non-seperation of two homologous X chromosomes during anaphase I of meiosis.
Detailed explanation-2: -When a white eye Drosophila male(XrY) is crossed to a red eye female (XRXR), in the F2 generation all the females are red eyed and 50% males are white eyed.
Detailed explanation-3: -White eye color is a mutant phenotype, caused by a mutation in a gene in the pigment pathway, discovered in 1910 by the father of modern genetics, Thomas Hunt Morgan (Green, 2010; Morgan, 1910).
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