2006-10-28 11:38:25 · 9 answers · asked by Denise D 1 in Science & Mathematics ➔ Biology
It is genetic, absence or presence of melanin
2006-10-28 11:42:50 · answer #1 · answered by Mr Glenn 5 · 0⤊ 0⤋
It's probably caused by transposons- genes that can move around in the DNA. If the transposon moves into the pigment gene for one eye, and disrupts the gene, the eye pigment will not be produced, so the eye will be blue. If the other eye is brown, you have someone with two different colored eyes.
2006-10-28 11:48:10 · answer #2 · answered by bflute13 4 · 0⤊ 0⤋
Its called Heterochromia iridium. Its caused when an individual has different amounts of melanin in each of their irises. It is thought to result from an alteration to one of the genes that controls eye color.
My friend has one brown eye and one blue eye.
2006-10-28 11:42:08 · answer #3 · answered by Anonymous · 2⤊ 0⤋
because not everyone has the same colored eyes?
i dont think anyone really knows why we have different eyes.
but its a good thing because if we didnt, we'd all look the same.
2006-10-28 11:55:20 · answer #4 · answered by ╣♥╠ 6 · 0⤊ 1⤋
it can also be caused by eye injury - where one become darker than the other.
2006-10-28 11:54:37 · answer #5 · answered by Tim S 1 · 0⤊ 0⤋
i think its got something to do with genes
2006-10-30 11:54:12 · answer #6 · answered by szx 2 · 0⤊ 0⤋
Because their circuits dead, there's something wrong?
2006-10-28 11:48:04 · answer #7 · answered by Anonymous · 0⤊ 1⤋
coz we all different
2006-10-28 11:45:13 · answer #8 · answered by Anonymous · 0⤊ 1⤋
they are painters?
2006-10-28 11:47:45 · answer #9 · answered by Clint 6 · 0⤊ 1⤋