In the 1980s and 1990s,positional Cloning Led to the Discovery

Multiple Choice

In the 1980s and 1990s,positional cloning led to the discovery of genes that

A) encode all proteins in the human genome.
B) cause hemophilia,fragile X syndrome,and colorblindness.
C) cause several types of cancers.
D) cause Duchene muscular dystrophy,cystic fibrosis,and Huntington disease.