Question

Klinefelter's syndrome is a result of

which of the following nondisjunction
mutations?
A. two X chromosomes and a Y
B. three copies of the 21st chromosome
C. deletion of chromosome 5
D. only an X chromosome

Answer 1

A.

Step-by-step explanation:

Only X is called monosomy X, 3 copies of 21st chromosome is Down syndrome and deletion of chromosome 5 is called 5q- syndrome