Child’s sex depends on father’s genes

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1212g.jpgBritish specialists conducted a series of studies on the topic what affects a future child’s sex. It turned out that a boy will likely be born, if his family tree contained many men.

Experts analyzed family tree of more than 900 families (more than 500 000 people), whose ancestors lived since the beginning of 1600. As a result, scientists concluded: the more men were among ancestors of representatives of a strong sex, the higher likelihood of boy birth is.

The point is that in sperm of such men contains more Y-chromosomes, which, in combination with female X chromosome are responsible for birth of a boy (if man passes a child X-chromosome, a girl is born).

However, scientists could not find out reasons why men produce more sperm with Y-chromosome.

Women have no relationship between men and women quantity in a family tree and sex of a future child.

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