Question

Rakesh is colour blind, married to Sangeeta who is having normal v1s10n (Homozygous). They have a son and a daughter. Determine the type of vision in their children with the help of a suitable chart.

Answer 1

1. Rakesh is a colour-blind man. Hence his genotype will be X^c Y.
2. Sangeeta is normal and homozygous. Hence her genotype will be \[\ce{\overset{C}{X}\overset{C}{X}}\].
3. Cross:  
4. Phenotypes of the F₁ generation would be 2 carrier daughters and 2 normal sons.
5. Since daughters are carriers, their vision will be normal.
6. So all the children will have normal vision.