The most common autosomal abnormality present in people is
A)XXX.
B)XXY.
C)XO.
D)a deletion in chromosome 5.
E)an extra chromosome 21.

Question

The most common autosomal abnormality present in people is
A)XXX.
B)XXY.
C)XO.
D)a deletion in chromosome 5.
E)an extra chromosome 21.

Quizplus · Accepted Answer

The most common autosomal abnormality is an extra chromosome 21, also known as Down syndrome. This occurs in approximately 1 in every 700 births. The other options listed are sex chromosome abnormalities or a specific deletion in a particular chromosome, which are less common than Down syndrome.

The Most Common Autosomal Abnormality Present in People Is