Which of the following is true of aneuploidies in general?
A) A monosomy is more frequent than a trisomy.
B) 45 X is the only known human live-born monosomy.
C) Some human aneuploidies have selective advantage in some environments.
D) Of all human aneuploidies, only Down syndrome is associated with mental retardation.
E) An aneuploidy resulting in the deletion of a chromosome segment is less serious than a duplication.

Question

Quizplus · Accepted Answer

There are other monosomies that are incompatible with life in humans, but 45 X is the only known human monosomy that allows for live birth.

Answer: C 
 Some aneuploidies, such as trisomy 21 (Down syndrome), have been associated with higher survival rates in certain environments, such as reduced susceptibility to infections.

Note: Options A, D, and E are incorrect. Aneuploidies can result in either monosomy or trisomy, depending on the specific chromosome involved. Mental retardation can be associated with other aneuploidies besides Down syndrome. The severity of an aneuploidy resulting in deletion or duplication depends on the specific genes affected and the size of the deleted/duplicated region.

Which of the Following Is True of Aneuploidies in General