Final answer:
Melanin is the physical attribute associated with darker skin tones or freckles in patients, determined by melanocytes in the skin.
Explanation:
Melanin is the physical attribute associated with darker skin tones or freckles in patients. It is a pigment produced by melanocytes in the skin that determines skin, hair, and eye color. Individuals with more eumelanin have darker skin that tans easily, while those with more pheomelanin tend to have light-colored skin, red or blond hair, and freckles.
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