3 years ago

When a child is born with down syndrome, when did the mutation occur?

Biology

2 answers:

DerKrebs [107]3 years ago

8 0

It occurred during meiosis.

Varvara68 [4.7K]3 years ago

5 0

It occurred doing meiosis, as when the gametes were combining a third chromosome was added to the 21st pair and caused Trisomy 21 Sydnrome, or as we know it, Down’s Syndrome.

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