The following is caused by a single pair of genes
A) cystic fibrosis.
B) Down syndrome.
C) sex-linked chromosomal abnormalities.
D) Crohn's disease.

Question

Quizplus · Accepted Answer

Cystic fibrosis is caused by a single pair of genes, specifically mutations in the CFTR gene. Down syndrome is caused by an extra copy of chromosome 21, sex-linked chromosomal abnormalities involve issues with the sex chromosomes, and Crohn's disease is a complex condition influenced by multiple genes and environmental factors.

The Following Is Caused by a Single Pair of Genes