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Q.

Select the incorrect statement from the following.

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a

In birds, the chromosome composition of the sperm determine the sex of the progeny.

b

Cystic fibrosis is Mendelian disorder.

c

Increase in a whole set of chromosome in an organism is known as polyploidy.

d

Down’s syndrome is chromosomal disorder

answer is A.

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Detailed Solution

Among birds, females exhibit heterogamety. Hence the chromosome composition of ovum determines the sex of the progeny (not sperm).
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