Mongolism syndrome is caused by

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(c) Mongolism or Down&rsquo;s syndrome is caused by nondisjunction of $21^{st}$ chromosome pair during anaphase $I$.

As a result $(n + 1)$ gametes

Vedclass · Accepted Answer

One extra chromosome in 21st pair

Vedclass · Answer

(c) Mongolism or Down&rsquo;s syndrome is caused by nondisjunction of $21^{st}$ chromosome pair during anaphase $I$.

As a result $(n + 1)$ gametes are formed.

Fertilization with normal gamete $(n)$ result in trisomy $(2n + 1).$

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