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Why do humans have near-equal numbers of male and female babies, unlike many other animals? A new genetic study looks for clues

  • Written by Jenny Graves, Distinguished Professor of Genetics and Vice Chancellor's Fellow, La Trobe University
Why do humans have near-equal numbers of male and female babies, unlike many other animals? A new genetic study looks for cluesIbragimova / Shutterstock

We know that boys and girls are produced in much the same frequency. But how – and why – is this 1:1 ratio achieved?

A new paper searches huge human data sets for gene variants that throw the 1:1 sex ratio off balance, and test the biological and theoretical rules of sex ratio.

What produces the 1:1 sex ratio?

Ear...

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