Will my baby grow up to be color blind?

The gene that distinguishes between red and green are on the X-chromosomes. There are no color vision genes on Y-Chromosomes. Therefore, color blindness is called as 'X-linked' trait.

A female with one defective and one normal X-chromosome has normal vision.

A male with a defective color vision gene on his X-chromosome, is colorblind.

There are no genes for normal color vision on the Y-chromosome to cover for the defective X-chromosome.

1. Father: No Color blind defect, Mother: 'one defective and one normal'

Male off spring: Color blind

2. Father: Color blind defect, Mother: No Color Blind defect

Male off spring: No color blind defect

Female off spring: 'one defective and one normal'