Which of the following is caused by a single pair of genes?

Question

Quizplus · Accepted Answer

Cystic fibrosis is caused by a mutation in a single pair of genes (specifically, the CFTR gene), making it a monogenic disorder. Down syndrome is caused by an extra copy of chromosome 21 (trisomy 21), not a single gene mutation. Sex-linked chromosomal abnormalities are related to the X or Y chromosomes but are not caused by a single pair of genes. Crohn's disease is a complex disorder influenced by multiple genes and environmental factors, not a single gene mutation.

Which of the Following Is Caused by a Single Pair