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Q.

If a normal sperm with Y chromosome fertilises the ovum with an additional 21st chromosome, the zygote formed develops into

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a

Turner female

b

Klinefelter's male

c

Down’s male

d

Super female

answer is C.

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Detailed Solution

Trisomy of 21st chromosome results in Down’s syndrome. Since its Y chromosome that fertilised the ovum, it will be a male.
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