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More than a chicken, fewer than a grape

Exact tally of human genes remains elusive

By
2:47pm, October 13, 2010

BOSTON — No one really knows all the genetic parts needed to make a human being.

Exactly how many genes make up the human genome remains a mystery, even though scientists announced the completion of the Human Genome Project a decade ago. The project to decipher the genetic blueprint of humans was supposed to reveal all of the protein-producing genes needed t

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