In skip generation inlheritance of colour blindness the trait from a colourblind man is passed on to

Options

A. Daughter
B. son
C. Grand duaghter
D. Grand son

Answer

### Step-by-Step Solution:

1. **Understanding Color Blindness**:
- Color blindness is a genetic condition where individuals have difficulty distinguishing certain colors, primarily red and green. It is an X-linked recessive trait.

2. **Inheritance Pattern**:
- Since color blindness is X-linked, it is carried on the X chromosome. Males (XY) have one X chromosome, while females (XX) have two. This means that if a male has the color blindness gene on his X chromosome, he will express the trait. Conversely, a female must have the gene on both of her X chromosomes to be colorblind; if she has it on only one, she will be a carrier.

3. **Skip Generation Inheritance**:
- The term "skip generation" refers to the situation where a trait is not expressed in one generation but appears in the next. In this case, a colorblind grandfather can pass the trait to his grandson through his daughter (the mother of the grandson).

4. **Example of Inheritance**:
- If a colorblind man (father) has a daughter with a normal vision man, the daughter will be a carrier of the colorblind gene (XcX). If this carrier daughter has children, she can pass the colorblind gene to her son (the grandson of the colorblind grandfather), making him colorblind (XcY).

5. **Conclusion**:
- Therefore, the trait for color blindness skips a generation and is passed from the colorblind grandfather to the grandson through the carrier daughter.

### Answer:
The trait from a colorblind man is passed on to his grandson.

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