what is the evolutionary advantage of having different eye colors in humans? how did that develop?

Answer 1

Why does it need to be an evolutionary advantage? What disadvantage could it be?

Answer 2

Melanin in the eye has the same effect as melanin in the skin, it protects from sun damage. Blue eyes are more prone to sun damage. Irrelevant when at cold latitudes like Scandinavia, Arctic etc, but quite damaging at the equator. Decreased melanin production is beneficial for allowing uptake of vitamin D, important in colder climates, not so important where there is plenty of sunlight. Blue eyes, like pale skin and blonde hair, are just the result of this reduced melanin.

Answer 3

There is no technical advantage to that of color eyes, its all based on how one received that trait, and the trait could have connection to your skin color. Which means the lighter skin colors have little pigment(light eye) vs. the dark skin colors (dark eye). The darker your skin color is the better off you'll be protected against UV radiation from sunlight. The people that have dark skin usually originated from area of constant sunlight exposure, and vice verse.

So basically, I said that the eye color gene is coincided with skin color (and your origin).

Answer 4

because it extremely is the way God wanted us to be. besides, diverse eye hues are produced using diverse quantities and kinds of pigment in the iris. the quantity of pigment and the progression of the pigment is determined by technique of someone's genetic makeup. The DNA gained from one's dad and mom determines what colour eyes they could have. each and each and every human has 40 six chromosomes placed in the nucleus of the cellular. those are divided into 23 pairs of chromosomes. a touch one inherits one chromosome from each and each and every figure in each and each and every pair of chromosomes. a chunk of DNA on a chromosome is termed a gene. Genes are the necessary unit of heredity, they ascertain many characteristics about a touch one. Genes also are available in pairs. Alleles are cutting-edge in genes and ascertain the creation of any function. There are 2 alleles for each trait inherited. If both alleles are a similar then they're homozygous for that gene. If the alleles are diverse, then they're called heterozygous. One allele is expressed over the different allele. it is termed the dominant allele, the unexpressed allele is termed recessive. as an celebration, if there turned right into a brown allele and a blue allele, the brown is dominant, so the guy ought to have brown eyes. yet no longer merely one pair of genes can administration a unmarried trait. at present there are 3 properly-known gene pairs that administration eye colour. The bey 2 gene on chromosome 15 consists of a brown and blue allele. also on chromosome 15, the bey a million gene is the numerous brown gene. On chromosome pair 19 the gey gene consists of a eco-friendly allele and a blue allele. A eco-friendly allele is dominant over a blue allele, and a brown allele is dominant over both eco-friendly and blue alleles. For the bey 2 gene if someone has a brown allele then they could have brown eyes. in the gey gene the golf eco-friendly allele is dominant over the blue allele, notwithstanding it remains recessive next to a brown allele. as an celebration if someone has a brown allele on chromosome 15, yet all the different alleles are blue or eco-friendly, they could have brown eyes. A eco-friendly eyed man or woman ought to have a eco-friendly allele on chromosome 19 and all or another blue alleles. Blue eyes are produced merely with 2 blue eye genes. All 4 alleles should be blue to grant a blue eyed man or woman.