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Rare family has had many more sons than daughters for generations


Analysing the births of a Utah family over seven generations has revealed that their disproportionate number of boys could be caused by a selfish Y chromosome

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Scuentists discovered a Utah family that has been having twice as many boys as girls for seven generations. It is the first clear evidence that humans might have ‘selfish genes’ that distort the sex ratio of offspring from roughly 50:50.

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