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

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

Quizplus · Accepted Answer

Down syndrome is characterized by an extra copy of chromosome 21, a condition known as trisomy-21, which results from errors in the division of the parents' egg or sperm cells.

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