Newcastle University scientists discovered males were more prone to have sons when they had more brothers and vice versa should they had more siblings.
They looked over 927 family woods, with information on 556,387 folks from the united states and European countries, returning to 1600.
The exact same website link between sibling sex and offspring intercourse had not been discovered for females.
The exact method that genes can influence infant intercourse continues to be unverified.
But the Evolutionary Biology research could get rid of a long-standing secret – a flooding of kid children after World War I. „A guy’s hereditary makeup may may play a role in whether he has got sons or daughters, research of centuries of family members woods recommends.“ weiterlesen