Down syndrome results from flaws in the parents' egg or sperm cells,a condition called
A)Trisomy-21.
B)Fragile-X.
C)cretinism.
D)phenylketonuria (PKU).

Question

Quizplus · Accepted Answer

Down syndrome, also known as Trisomy-21, occurs when there is an extra copy of chromosome 21 in either the egg or sperm cell, leading to developmental and intellectual disabilities. Fragile-X, cretinism, and phenylketonuria are all genetic disorders that result from different types of genetic mutations or abnormalities.

Down Syndrome Results from Flaws in the Parents' Egg or Sperm