Answer to Question #226603 in Genetics for Moera

Question

A boy with colour blindness, has a mother with normal colour vision and a father with colour blindness. Did the boy inherit the gene for colour blindness from his mother or his father? Explain your answer to question 2a by using a Punnett square to identify the source of the colour blindness gene that was passed on to this boy.

Explain this type of heredity.

Answer 1

The most common form of color blindness is red-green color blindness. With this condition, the gene is passed from the parent to the child on the X chromosome. Globally, 1 in 12 males and 1 in 200 females are colorblind.