English, asked by mantashafirdoush457, 3 days ago

A human is
Mention the cause
suffering from
from Down's
synde
one.

Answers

Answered by vishalverma5690

2

Answer:

About 95 percent of the time, Down syndrome is caused by trisomy 21 — the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell.0

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