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In Down 's syndrome of a male child , th...

In Down 's syndrome of a male child , the sex complement is

A

XO

B

XY

C

XX

D

XXY

Text Solution

Verified by Experts

The correct Answer is:
B
XY is the sex complement of a male child with Down's syndrome. The cause of Down's syndrome is non-disjunction of 21st chromosome during oogenesis. This chromosomal abnormality is related with autosome so, the sex complement of a male child in this syndrome will be XY.
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