A normal visioned woman, whose father is colour blind, marries a normal visioned man. What would be probability of her sons and daughters to be colour blind. ? Explain with the help of a pedigree chart.

Explanation

To solve the problem of determining the probability of color blindness in the children of a normal visioned woman (whose father is color blind) and a normal visioned man, we can follow these steps:

### Step 1: Understand the Genetics of Color Blindness
Color blindness is a sex-linked recessive trait, which means the gene responsible for color blindness is located on the X chromosome. A normal vision allele is dominant (X^N), while the color blindness allele is recessive (X^c).

### Step 2: Determine the Genotypes of the Parents
- The woman has normal vision but her father is color blind. This means she must carry one normal vision allele and one color blindness allele (X^N X^c).
- The man has normal vision, and since color blindness is recessive, he must have two normal vision alleles (X^N Y).
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