Sasha has a genetic error.She has specific physical features,such as a wide tongue,and she is mentally retarded.Upon examining her chromosomes,we would find an extra 21ˢᵗ chromosome.What disorder does Sasha have?
A) fragile X syndrome
B) Down syndrome
C) anencephaly
D) Alzheimer's disease

Question

Quizplus · Accepted Answer

The presence of an extra 21st chromosome is a characteristic feature of Down syndrome, also known as trisomy 21. This leads to specific physical features and varying degrees of developmental and intellectual disabilities. Fragile X syndrome and Alzheimer's disease are caused by genetic mutations, but do not involve an extra chromosome 21. Anencephaly is a severe neural tube defect that results in the absence of a major portion of the brain and skull.

Sasha Has a Genetic Error