Constitutive skin color is the natural, genetically determined color of the epidermis, uninfluenced by ultraviolet (UV) light or hormone exposure. ... In contrast, facultative skin color results from exposure to UV light and other environmental factors.
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According to the question, Constitutive skin color is the natural, genetically determined color of the epidermis, uninfluenced by ultraviolet (UV) light or hormone exposure.
In contrast, facultative skin color results from exposure to UV light and other environmental factors.
Constitutive skin color is defined as the basal or genetically determined color in the absence of any external factor such as sunlight.
Thus, this is the main reason.
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https://brainly.com/question/2169866