Study Says Equal X and Y Chromosomes at Conception

March 30, 2015 8:04 PM

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Study Says Equal X and Y Chromosomes at Conception

At conception, the two sexes are produced at equal rates, study says.

NEW YORK (AP) — Every year, slightly more boy babies than girl babies are born worldwide. But back when sperm meets egg, the two sexes are conceived in equal numbers, a new study suggests.

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