Down syndrome is also called ______.
A) fragile X syndrome
B) trisomy 21
C) Klinefelter syndrome
D) trisomy 15

Question

Quizplus · Accepted Answer

Down syndrome is caused by the presence of an extra copy of chromosome 21, also known as trisomy 21. Fragile X syndrome is a separate genetic disorder caused by a mutation on the X chromosome. Klinefelter syndrome is caused by an extra X chromosome in males, while trisomy 15 is a rare genetic disorder caused by the presence of an extra copy of chromosome 15.

Down Syndrome Is Also Called ______