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Morgan's Experiments on Drosophila

A cross of a ...

Question

A cross of a wild type red-eyed female Drosophila with a violet-eyed male produces all red-eyed offspring. If the gene is sex linked, what should the reciprocal cross(violet-eyed female x red-eyed male) produce? (Assume that the red allele is dominant to the violet allele).

A

All violet-eyed flies

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B

3

red-eyed flies to

1

violet-eyed

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C

A

1 : 1

ratio of red and violet eyes in both males and females

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D

Red-eyed females and violet-eyed males

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Solution

The correct option is C A $1 : 1$ ratio of red and violet eyes in both males and females

A cross of a wild type red-eyed female Drosophila with a violet-eyed male produces all red-eyed offspring. Assuming that the red allele is dominant to the violet allele, if the gene is sex-linked, the reciprocal cross (violet-eyed female x red-eyed male) will produce A 1:1 ratio of red and violet eyes in both males and females.
So, the correct answer is 'A 1:1 ratio of red and violet eyes in both males and females'.

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