Mapping Genetic Differences An effort is under way to map human genetic differences. The "haplotype map" could help determine why some people are prone to certain diseases. NPR's Steve Inskeep talks with Dr. Francis Collins.

Mapping Genetic Differences

Mapping Genetic Differences

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An effort is under way to map human genetic differences. The "haplotype map" could help determine why some people are prone to certain diseases. NPR's Steve Inskeep talks with Dr. Francis Collins.