'Nonsense' In Our Genes: One In 200 Human Genes Superfluous?

A study of the genetic code of more than 1,000 people has found that at least one in 200 human genes can be inactivated in apparently healthy people. The findings suggest that, though these genetic mutations can be harmful, they generally have little effect on the individual and could occasionally even be beneficial in evolutionary terms. The study also found that individuals carry on average 46 of these inactivating mutations.

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