Ques. Of both normal parents, the chances of a male child becoming colour blind are
A. none
B. possible only when all the four grand parents had normal vision
C. possible only when father’s mother was colour blind
D. possible only when mother’s father was colour blind.
Answer:D
Ques. Of both normal parents, the chances of a male child becoming colour blind are
A. none B. possible only when all the four grand parents had normal vision C. possible only when father’s mother was colour blind D. possible only when mother’s father was colour blind.