Melanin.
purple
It is the eye color
Eye color is polygenic and controled by 4 pairs of genes .Blue eye color is totaly recessive to all other colors .
The default eye color in humans is often considered to be brown, as it is the most common eye color globally. This prevalence is due to the higher levels of melanin in the iris, which not only provides the brown color but also offers protection against UV light. Other eye colors, such as blue, green, and hazel, are the result of variations in melanin production and genetic factors.
Eye color in humans is primarily determined by genetics, specifically the genes that control the production and distribution of melanin in the iris. The amount and type of melanin present in the iris determines the color, with more melanin resulting in darker colors like brown and less melanin resulting in lighter colors like blue.
any color humans have
polygenic
The alleles for eye color result different combiantions of different eye-color shades from the offspring's parent.
It is extremely common for humans to have no earlobe to speak of . . . it is hereditary just like eye color or skin color.
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Eye color in humans is primarily determined by genetic factors that influence the amount and distribution of melanin in the iris. The main genes involved include OCA2 and HERC2, which regulate melanin production. Higher melanin levels typically result in darker eye colors, such as brown, while lower levels can lead to lighter colors like blue or green. Environmental factors and evolutionary adaptations may also play a role in the variation of eye color across different populations.
It is difficult to use a Punnett square to determine eye color because eye color is influenced by multiple genes interacting in a complex manner. Additionally, environmental factors can also play a role in determining eye color. As a result, the simple Mendelian inheritance patterns that Punnett squares rely on may not accurately predict the outcome for eye color.