If the assumption that the ratio of births is 50/50, then no. However, a rule requiring parents to have children until they have a boy could lead to evolutionar

If the assumption that the ratio of births is 50/50, then no. However, a rule requiring parents to have children until they have a boy could lead to evolutionary pressure increasing the ratio of girls born. That is, if the Smiths have 4 girls and one boy their genes will be 4 times more common than those of the Jones with their one boy.