Which of the Following Statements Correctly Describes Aneuploid Conditions

Multiple Choice

Which of the following statements correctly describes aneuploid conditions?

A) A monosomy is more frequent than a trisomy.
B) Monosomy X is the only known viable human monosomy.
C) Of all human aneuploidies,only Down syndrome is associated with developmental delays or subnormal intelligence.
D) An aneuploidy resulting in the deletion of a chromosome segment is less serious than a duplication.