A bald man marries someone who is not bald but whose father was bald. What is the % chance of a child who will eventually be bald?
1/4 chance of a girl and
2/4 chance of boy with baldness all will be bald
1/4 chance of a girl and 1/4 chance of a boy of all the children
2/4 girls bald and 2/4 boys bald