Answer to Question #101878 in English for Thato

Question #101878
Multiple choice questions
1. Down's syndrome develops because of deviation in the genes of the.......... chromosome.

A. 18-th
B. 21- first
C. 13-th
D. A, b, and c
1
Expert's answer
2020-01-29T06:44:18-0500

The answer is 'B' 21-first. Down syndrome occurs when part of chromosome 21 becomes attached (trans-located) to another chromosome during the formation of reproductive cells (eggs and sperm) in a parent or very early in fetal development.


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