A colour blind boy is born to a couple with a normal colour vision. Write the genotype of the parents.

Explanation

To determine the genotypes of the parents of a colorblind boy, we need to understand the genetics behind colorblindness, which is a sex-linked disorder.

### Step-by-Step Solution:

1. **Understanding Colorblindness**:
- Colorblindness is a sex-linked trait, specifically linked to the X chromosome.
- The gene responsible for colorblindness is recessive, meaning that a person needs two copies of the colorblind allele (Xc) to express the trait (for females) or one copy (for males) since they have only one X chromosome.

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