The most common viable chromosome abnormality is
A) Fragile-X syndrome.
B) Trisomy 21.
C) Turner's syndrome.
D) Klinefelter's syndrome.
E) a translocation defect.

Question

Quizplus · Accepted Answer

Trisomy 21, also known as Down syndrome, is the most common viable chromosome abnormality, occurring in about 1 in every 800 live births. It is characterized by the presence of an extra copy of chromosome 21, resulting in intellectual disability and certain physical characteristics. While other chromosome abnormalities may be more common in certain populations or types of individuals (such as Fragile-X syndrome in males), trisomy 21 is the most common overall.

The Most Common Viable Chromosome Abnormality Is