Skin whitening, or the lightening of skin pigmentation, is influenced by genetics, but it's not solely determined by them. The process is a complex interplay of genetic predisposition and environmental factors.
The Role of Genetics
Genetic variations significantly impact skin color. Genes, inherited from parents, influence the production and distribution of melanin, the pigment responsible for skin tone. Studies have identified specific genes, like SLC24A5, playing a crucial role in skin lightening. A mutation in this gene is associated with a significant reduction in melanin, contributing to lighter skin tones. Researchers Pinpoint Human Skin Color Gene | PBS News This doesn't mean that skin color is entirely predetermined; rather, these genes provide a baseline. Deciphering the genetic link between skin tone and ancestral origins ...
Differences in skin color among individuals arise from variations in pigmentation, a result of genetics inherited from biological parents. Human skin color - Wikipedia
Environmental Factors
Environmental influences also play a significant role. Exposure to sunlight, for instance, stimulates melanin production, leading to tanning. Conversely, lack of sun exposure can result in lighter skin. Other environmental factors, like diet and certain chemicals, may also influence pigmentation. Furthermore, psychological stress, exposure to ultraviolet radiation, or contact with specific chemicals or skin-whitening products can trigger conditions like vitiligo, resulting in skin depigmentation. [The condition probably results from a combination of genetic and environmental factors, many of which have not been identified](Reference provided in prompt). Vitiligo: Types, Symptoms, Causes, Treatment & Recovery
Conclusion
In summary, while genetics establish a foundation for skin tone, environmental factors significantly interact to determine the final outcome. Therefore, skin whitening is not solely a genetic phenomenon.
