Sperm May Hold Key To Cancer, Chimp Study Suggests

The evolutionary path that separated humans from chimps 5 million years ago may have made human sperm survive better but paradoxically may have made humans prone to cancer. A comparison of chimpanzee genes to human genes shows a concentration of genes unique to people in areas associated with sperm production and cancer, and suggests the changes that make humans unique also make us uniquely prone to cancer.

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