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.

Question

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Positional cloning is a technique used to identify the location of a gene on a chromosome. In the 1980s and 1990s, positional cloning led to the discovery of genes that cause several types of genetic diseases, including Duchene muscular dystrophy, cystic fibrosis, and Huntington disease.

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