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Question

How many types of gametes will be produced by female Drosophila having following arrangement of two genes (y+,w+) on X-chromosomes?

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A
2
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B
4
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C
1
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D
8
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Solution

The correct option is A 2
The genotype given consists of one X chromosome with two genes and one Y chromosome. During gametogenesis, these two chromosomes will segregate. Hence, the gametes formed will be: one with the X chromosome and autosomes and second with the Y chromosome and autosomes.
So, the correct answer is '2'.

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