A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?

X_cY and X_cX

No worries! We‘ve got your back. Try BYJU‘S free classes today!

XY and X_cX_c

No worries! We‘ve got your back. Try BYJU‘S free classes today!

XY and X_cX

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

This is not possible!

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
XY and X_cX

Since the male is normal, the genotype has to be XY. The female can be either XX, X_cX or X_cX_c. Since the female is normal, she has to be either XX or X_cX. For the child to be colour blind, the mother has to be a carrier at least. Therefore, the genotype of this mother has to be X_cX.

Suggest Corrections

Similar questions

A normal male marries a female who is a carrier of colour blindness. What is the possibility of this couple having a son suffering from colour blindness?

A couple with normal vision has a child with colour blindness. Since we know that colour blindness is an X-linked disease, how would you indicate the mother in the pedigree chart?

A couple with normal vision bear a colour blind child. Work out a cross to show how it is possible and mention the sex of the affected child. [3]

Q. Three Mark Questions :
A couple with normal vision bear a colour blind child. Work out a cross to show how it is possible and mention the sex of the affected child.

Q. A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy

Join BYJU'S Learning Program