For the first time in humans, researchers have discovered a large chromosomal rearrangement that bears the mark of natural selection, they report in the February issue of Nature Genetics. The ...

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Why a good lunch can be enough to cover genetic disposition, explaines Stephen C. Stearns . Natural selection in humans turns out to be a multifaceted. Many public-policy decisions are based on ...

Assisted reproductive technologies (ART) can bypass female-modulated sperm selection (top of figure) that ensure that genetically compatible or competent sperm are used for fertilization. ART can also ...