Despite what you've learned in school, eye color in humans is not controlled by a single gene. It's controlled by two genes. One gene produces pigment, and a second gene controls whether or not the pigment is deposited into the iris. People who are dominant for both will make and deposit color and have brown eyes (green, amber, etc, depending on the alleles for pigment that the person has). People who are dominant for the first gene will make color, but if the second gene is recessive, the pigment will not be deposited and they will have blue eyes. People recessive for both neither make the pigment nor deposit it, even if they had pigment around - they have blue eyes too. What is the name of this phenomenon

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16-12-2021
Biology

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Despite what you've learned in school, eye color in humans is not controlled by a single gene. It's controlled by two genes. One gene produces pigment, and a second gene controls whether or not the pigment is deposited into the iris. People who are dominant for both will make and deposit color and have brown eyes (green, amber, etc, depending on the alleles for pigment that the person has). People who are dominant for the first gene will make color, but if the second gene is recessive, the pigment will not be deposited and they will have blue eyes. People recessive for both neither make the pigment nor deposit it, even if they had pigment around - they have blue eyes too. What is the name of this phenomenon

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mboluwape mboluwape · Answer 1 · 2021-12-21T13:56:20+01:00

Eye colour was once thought to be controlled by a single gene but in actuality, it is controlled by two genes concluding that eye colour is a polygenic trait.

The phenomenon used to explain the concept of eye colour being controlled by two genes is multiple alleles.

At a single genetic locus, the presence of more than two different contrasting characteristics regulated by several alleles is termed multiple alleles.

In a population, various versions of the same gene exist such that different eyes colour can be expressed including brown eyes, green, amber, etc, depending on the alleles for pigment that the person has.

Learn more about multiple alleles: https://brainly.com/question/4619327