Question

10. ____________ is defect due to extra chromosome. *

A. Cretinism

B.Microcephalus

C.Down’s Syndrome

D. hydrocephalus​

Answer 1

Explanation:

C.Down’s Syndrome is defect due to extra chromosome. 

Answer 2

Answer:

Dowm's Syndrome.

Also know as Down Syndrome , trisomy 21 is a genetic condition caused by an extra chromosome most babies inherit 23 chromosomes from each parent , fir a total of 46 chromosomes. Babies with Down Syndrome however, end up with three chromosomes at position 21 , instead of the usual pair.