My paternal grandmother has green eyes and my paternal grandfather has blue eyes, but my dad has brown eyes?
355647
It depends on what genes are passed down.  I have brown eyes and my husband has blue eyes...our daughter has green eyes.  We both must carry a green eye gene that she got.
220614
Well, in scientific form this is caused by the Mendelian trait, Law of Dominance. One trait (Btwn any of your parents)is more dominant than the other. It can also be caused by sex-linked traits found in the x-chromosome. There are characteristics that the daughter will get that is diff. from the son. It is just normal. I too look more like my dad.
30998
dyeing them if not that way than through family genes
360951
It's very possible. My best friend is Native American, and she is as blue eyed/blonde as them come. Recessive genes can toss you through a loop. Give him the benefit.
1096018
There is a WONDERFUL site that you can input both parents eye colors (and their parents) and it will tell you the percentages of what you offsprings eyes could be!\n\nhttp://www.thetech.org/genetics/\n\nDown near the bottom left it will have the link for you to launch the application to do the test.
801922
No.  The gene is carried on the X chromosome.  But it is a sex based trait.  The father passes a Y chromosome to his son.  The gene for color blindness has to come from the mother, she is the one who gives the X chromosome.\nIf the father and son where both color blind, it would be just due to coincidence.
563641
What color are your eyes normally?  \n\nYou probably have green in your eyes, if they're hazel.  Mine are brown, and ain't nothin gonna turn my brown eyes green!  I also quit smoking, and they're still brown.
746527
my grandfather & dad.
912389
there are several genes in play\nlets start wtih eyes.. simply knowing his eye color is a start BUT you also need to know his parents eye color becuase he could be hiding a recessive gene..\nassuming he isnt - the kids will ALL have brown eyes.. but if he has a recessive blue gene then the kids have a 50/50 chance of blue or brown eyes...\nand so on for all genetics\n\nanyhow so in truth NOT only god.. but anyone with a knowledge of genetics can predict...\none thing though - get married before you start pumping out the kids.. and stop after 1 kid - the world is plenty crowded of people already
175779
Brown-pigmented eyes are so dark that there could easily be green-eyes pigment there-and a previous answerer went into detail about the relative level of pigment, so there is no fear of infidelity.\nBut, in the case of kitty....\nNot to put too fine a point on it, but Im not aware of any genetic way two blue-eyed people can have a brown-eyed child normally... Blue eyes are recessive, being a very low level of pigment-If either parent carried a different gene, one that coded for brown eyes, then *they* would be brown eyed.  If you have brown eyes, but both your parents have blue eyes, I would suspect that one or both were not your biological parent.
882452
Hazel eyes are usually a mixture of green and brown, if that's what your asking.
321377
you inherited the genes from your parents if non of your parents have blue eyes it means your mother slept with the milkman
1129008
Genetics.  Green eyes are a genetically recessive trait, just like blue eyes are.  Someone in your family also has green eyes.  Possibly a grandparent or great-grandparent.
934864
I am Welsh. Most fellow Welsh people I know have dark hair, but I do know a lot of people who have light coloured eyes. I myself have black hair and dark brown eyes although blue eyes do also run in my family.
688014
My dad has brown eyes and he has classical Jewish features (black hair, hooked nose, etc.), but he is dark skinned. He must have had a Negroid ancestor. His twin sister, on the other hand, is blonde haired, blue eyed, and white as chalk. (Do you think grandma [white] slept with a Caucasian & negroid person at the same time? grandpa was mixed, though he was Jewish) It is our only explanation why one twin should be "white" and the other "black". Does this help?
940033
Let's take the Blue eyes - brown eyes example.  Brown is the dominant trait, so we'll use the capital B letter.  Blue is the recessive trait, so we'll use the b letter.  A person with blue eyes has the genotype bb (got a b from dad and a b from mom).  A person with brown eyes can be homozygous BB (got B from dad and B from mom) or heterozygous Bb (got B from one parent and b from the other parent).\nA first generation usually starts with pure breeds, so both homozygous.  We'll have BB and bb as the starting parents.  Those parents produce gametes in their gonads.  Let's say that mom has blue eyes and dad has brown eyes.  All her eggs will have the b gene as all dad's spermatozoids will have the B gene.  If you want to make the Punnett square, you'll find that all babies will have 100% probability to be Bb\n____|__B__|__B__\n__b_|_Bb__|_Bb__\n__b_|_Bb__|_Bb__\nThe second generation is made by taking two of those offspring and crossing them.  First, you have to find out what alleles will be in the gametes.  Half of the eggs will be b and half will be B.  Also, half of the spermatozoids will be B and half will be b.  In the Punnett square you'll have.\n____|__B__|__b__\n__B_|_BB_|_Bb_\n__b_|_Bb__|_bb__\nHere, the babies will have 25% chance to have blue eyes (bb) and 75% chance to have brown eyes (25% homozygotous BB and 50% heterozygotous Bb).
904553
Not many people have black hair and blue eyes, but the effect is pronounced and quite lovely.\nHaving natural Black hair and blue eyes is commonly a Celtic trait.  If you are of European origin, my guess would be that you have a Celtic background.  My grandfather was Welsh and he had dark hair and bright blue eyes.\nI've also heard of Indian people having similar characteristics.