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The number of chromossomes in Down's syn...

The number of chromossomes in Down's syndrome is

A

23rd pair with one less =45

B

21st pair with one more=47

C

17th pair with one more =47

D

One extra sex chromosome =47

Text Solution

Verified by Experts

The correct Answer is:
B
The individulas with this syndrome are tisomic for chromosome 21. Chromosome complement is `46 + ` additional chromosome 21 = 47.
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