Biology, asked by nikhilkumargolu1999, 1 year ago

The trisomy of 21st chromosome causes-

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Answered by pessuvp2ai75
0

Most cases of Down syndrome are not inherited. When the condition is caused by trisomy 21, the chromosomal abnormality occurs as a random event during the formation of reproductive cells in a parent. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells.

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