Which of the following statements is generally true of aneuploidies in newborns?
A) A monosomy is more frequent than a trisomy.
B) Monosomy X is the only viable monosomy known to occur in humans.
C) Human aneuploidy usually conveys an adaptive advantage in humans.
D) An aneuploidy resulting in the deletion of a chromosome segment is less serious than duplication.

Question

Quizplus · Accepted Answer

Monosomy X, also known as Turner syndrome, is indeed the only monosomy that is generally viable in humans. Most other monosomies (the loss of one chromosome from a pair) result in prenatal lethality. Trisomies (the addition of an extra chromosome to a pair), such as Trisomy 21 (Down syndrome), Trisomy 18 (Edwards syndrome), and Trisomy 13 (Patau syndrome), can also be viable but are less common than monosomy X in terms of survivable conditions.

Which of the Following Statements Is Generally True of Aneuploidies