Chromosomal aberration refers to the structural or numerical changes that occur in the chromosomes. In the case of skin color inheritance in humans, it does not involve chromosomal aberration. Rather, it is a result of polygenic inheritance.

Polygenic inheritance is a type of inheritance pattern where a trait is controlled by multiple genes, each with a small additive effect. In the case of skin color, multiple genes contribute to its determination. These genes control the production, distribution, and type of melanin, the pigment responsible for skin color.

Here is a detailed explanation of why skin color inheritance in humans is an example of polygenic inheritance:

1. Polygenic Inheritance:
Polygenic inheritance is characterized by the interaction of multiple genes to determine a trait. In the case of skin color, several genes are involved in the production and distribution of melanin, which influences the color of the skin. This means that skin color is not determined by a single gene but is the result of the combined effects of multiple genes.

2. Multiple Genes:
Several genes have been identified to play a role in determining skin color. These genes include MC1R, SLC24A5, TYR, OCA2, and many more. Each of these genes contributes to the production, distribution, or type of melanin, which affects the color of the skin.

3. Additive Effect:
In polygenic inheritance, each gene contributes to the trait in an additive manner. This means that the effect of each gene is cumulative. In the case of skin color, the more genes associated with darker skin are present, the darker the individual's skin will be. Conversely, the more genes associated with lighter skin are present, the lighter the individual's skin will be.

4. Continuum of Variation:
Polygenic inheritance results in a continuum of variation for a trait, rather than distinct categories. In the case of skin color, this is evident in the wide range of skin tones observed in human populations. People with more genes for darker skin will have darker skin tones, while those with more genes for lighter skin will have lighter skin tones. The combination of different genes and their additive effects results in a wide spectrum of skin colors.

In conclusion, the inheritance of skin color in humans is an example of polygenic inheritance, where multiple genes interact to determine the trait. It is not an example of chromosomal aberration or point mutation.