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 a duplication.

Question

Quizplus · Accepted Answer

Monosomy X, also known as Turner syndrome, is the only viable monosomy known to occur in humans. Other monosomies, such as monosomy 21 or 18, typically result in miscarriage or stillbirth.

(A) is incorrect because trisomies are actually more frequent than monosomies in newborns.
(C) is incorrect because aneuploidies generally convey a disadvantage and can result in developmental abnormalities or genetic disorders.
(D) is incorrect because both deletions and duplications of chromosome segments can have serious consequences, depending on the genes affected.

Which of the Following Statements Is Generally True of Aneuploidies