The most common extra-chromosome condition is _____.
A) Down syndrome
B) nearsightedness
C) fragile X syndrome
D) Tourette syndrome

Question

Quizplus · Accepted Answer

Down syndrome, also known as trisomy 21, is the most common extra-chromosome condition, where individuals have three copies of chromosome 21 instead of the usual two. It is characterized by intellectual disability, characteristic facial features, and increased risk for certain medical conditions.

The Most Common Extra-Chromosome Condition Is _____