OK, my mother has light blue eyes and my father has green eyes. Well, I came out with huge brown eyes. What people notice about me is first how big my eyes are and then how dark they are. I have three brothers that all have blue eyes. My eyes are not just a different color but a completly different shape then anyones in my family. Also I am the olny one in my whole exstened family with brown eyes why?
2007-05-09 10:54:24 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Eye color is an inherited trait influenced by more than one gene. In humans, three loci associated with eye color are currently known: EYCL1, EYCL2, and EYCL3. These genes account for three phenotypic eye colors (brown, green, and blue) in humans. Eye color is demanding, as all four genes must determine the same color for the eye color to be pure; otherwise a mixed color such as hazel will result. Eye color usually stabilizes when an infant is around 6 months old.
Source: Wikipedia
2007-05-09 11:49:22 · answer #1 · answered by Anacani 2 · 0⤊ 1⤋
First of all, it's worth mentioning that for the most part brown eyes is a dominant characteristic. This means that almost everyone with even one gene for brown eyes has brown eyes. It also bears mention that the genetics of eye colour is not entirely worked out, so it's possible that there are some surprises in there.
Possible explantions, therefore, include:
At least one of the people who you think is your parent is not. Since brown eyes is generally dominant, it would be obvious if your parents had one of those genes. I list this first because it is simply the most likely explanation.
It is also possible that you are a mutant. DNA mutates rather frequently, actually, so it is concievable that somewhere very early you developed a mutant gene that causes your eyes to be brown instead of whatever they might otherwise have been. Practically speaking, it's almost certain you're a mutant - even identical twins have their differences - it's just a question of whether it got your eyes.
Or it's possible that you have some uncommon variant of brown eyes that is NOT dominant (you wouldn't be the first). This wouldn't be too strange a thing to happen either... it just seems unlikely because BOTH your parents would have to have this unusual recessive combination for you to have brown eyes. But stranger things than this happen all the time.
Those are the major possibilities, at least. There's even weirder stuff that could be going on other than that, but it's probably not worth worrying about those unless we exclude the more commonplace stuff.
2007-05-09 11:11:32 · answer #2 · answered by Doctor Why 7 · 1⤊ 1⤋
recessive gene; that is, a "sleeper". Say you have 75 genes for blue, 20 for green, and 5, or even 1%, for dark eyes. That one or 5 % chance fell into play. Happens all the time. That's what alot of deseases are all about. Many lurk in the remote odds ( sometimes 1/10,000), and "appear" every now and then. Others are far more common, like eyesight. My brother never needed glasses (like Mom) and I did (like Dad).
This "Doc" is a quack. Disregard.
2007-05-09 11:17:46 · answer #3 · answered by LELAND 4 · 0⤊ 0⤋
Eyecolor is considered a polygenic trait meaning more than one gene make up each eye color. you got the perfect mix for brown eyes, and it doesn't really matter a whole lot what color your parents eyes are because there are several genes that make it up.
2007-05-09 11:04:59 · answer #4 · answered by Red 1 · 1⤊ 0⤋
You probably aren't because it does take two genes to make something really obvious in a person. Maybe your parent's parent's had brown eyes.
2007-05-09 11:48:34 · answer #5 · answered by xoxo 2 · 0⤊ 0⤋
I'm not sure, because your mom would only be carrying the trait for blue eyes since it is ressive and your father would only carry green eyes. I took bio two years ago.. so just wait for a better answer.
2007-05-09 11:01:10 · answer #6 · answered by =)! 3 · 0⤊ 1⤋
i'm sorry i dont know the exact answer but i think it depends on what eye colour your grandparents or great grand parents had. becuase when your eye colour is determined you get a gene from your mother and a gene from your father and usually one dominates the other and usually brown dominates all colours but i think that there might be....sorry i dont know i thought i did sorry :(
2007-05-09 11:01:58 · answer #7 · answered by g 3 · 1⤊ 0⤋
It is probably because your mom and dad's looks blended together.
2007-05-09 11:05:56 · answer #8 · answered by Anonymous · 0⤊ 1⤋
both of ur parents have inactive modifyer cells
2007-05-09 10:58:44 · answer #9 · answered by Anonymous · 0⤊ 1⤋