Inheritance of skin colour in humans in an example of :-

Options

A. Inheritance of skin colour in humans is an example of:-
B. Chromosomal aberration
C. Point mutation
D. Polygenic inheritance

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the inheritance of skin color in humans and what type of genetic inheritance it represents. The options provided are chromosomal aberration, point mutation, or polygenic inheritance.

2. **Defining Polygenic Inheritance**: Polygenic inheritance refers to a type of inheritance where multiple genes (more than one) contribute to a single phenotypic trait. This means that several different genes can influence the outcome of a particular characteristic.

3. **Identifying the Trait**: Skin color in humans is a phenotypic trait, which means it is a physical characteristic that can be observed. It is influenced by the expression of multiple genes.

4. **Explaining the Genes Involved**: In the case of skin color, it is suggested that there are at least three different genes (let's denote them as A, B, and C) that are located at different loci on chromosomes. Each of these genes can have different alleles (variations).

5. **Genotype and Phenotype Relationship**: The combination of alleles from these genes determines the skin color:
- For example, a genotype of AABBCC may lead to darker skin color.
- Conversely, a genotype of aabbcc may lead to lighter skin color or even albinism.

6. **Conclusion**: Based on the explanation, the inheritance of skin color in humans is best described as polygenic inheritance, as it involves multiple genes contributing to a single trait.

### Final Answer
The inheritance of skin color in humans is an example of **polygenic inheritance**.

---