JAMB - Biology (1982 - No. 11)
If a 26 year old blind man married a young one-eyed woman and they had four children, how many of them would be blind like their father?
All
3
2
1
none
Giải thích
Blindness is not necessarily a genetic trait that is passed down from parents to offspring. The fact that the father is blind and the mother is one-eyed does not guarantee that any of the children will be blind.