Question

Which of the following diseases are caused by an expansion of trinucleotide repeats?

A) achondroplasia
B) cystic fibrosis
C) beta-thalassemia
D) fragile X syndrome
E) Marfan's syndrome

Answer 1

Trinucleotide repeat expansions cause diseases such as fragile X syndrome, myotonic dystrophy, and Huntington's disease.

Step-by-step explanation:

Trinucleotide repeat expansions are responsible for certain genetic diseases. The diseases caused by this type of expansion include fragile X syndrome, which is characterized by intellectual disability and behavioral problems, and myotonic dystrophy, which affects muscle function. Another example is Huntington's disease, which leads to the deterioration of a person's physical and mental abilities.