How do cats get eyes of different colors?Is it X-linked?
365729
There might be some sort of mosaic thing going on, possibly with the X.
805072
Even if they did crossbreed and produced offspring that were black, it wouldn't be able to get fixed into the population and produce more black cats since the hybrids would probably be sterile. There would have to be a constant cycle of leopards/jaguars (cougars have so far only been crossed with leopards) escaping, carrying the mutant gene, finding and breeding with a cougar, and then producing black instead of lightly spotted cubs.   I disagree that it is impossible for cougars to be melanistic. Melanism is most common in jungle dwelling cats (it may provide better camouflage and not get weeded out), but individuals of other species such as bobcats have been found melanistic or partially melanistic.  I do agree, though, that if we do find our first melanistic specimen of cougar it won't be in a scenario like this. The Florida panther population is pretty small and probably well studied. If a melanistic panther cub survived to adulthood it would probably be more likely to be found then if it turned up in another cougar population.
514572
Green is an ambiguous color in eye genetics. There is a very good chance your child would have light colored eyes, but brown hair is dominant over red hair. Plus, it looks as if your boyfriend was lucky with his red hair color, seeing as black hair is dominant. His father must have been heterozygous otherwise that would never have occured.\n\nYou are also heterozygous, since your mother had blond hair. There is an approximate 25% chance that your child will inherit your boyfriend's red hair.
1164536
By Mendelian theory, no. (bb= blue, BB & Bb=brown)\nBlue eyes are a recessive trait \nbb x bb = only bb\nNow if they were Brown eyed with the blue recessive trait and a blue eyed spouse\nBb x bb = Bb Bb bb bb\n\n-----------BUT---------------------\n\nMost of us learned the model for determining eye color that G.C. Davenport and C.B. Davenport devised in 1907. The Davenport model wrongly says brown eye color is always dominant over blue eye color, which means that two blue-eyed parents always have blue-eyed kids. We know better now.\n\n"Although not common, two blue-eyed parents can produce children with brown eyes," says Richard A. Sturm, a Principal Research Fellow at the Institute for Molecular Bioscience at the University of Queensland in Brisbane, Australia.\n\nEye color is a complex trait that depends on the state of several interacting genes. The gene that usually decides the issue (blue eyes or brown eyes) is the OCA2 gene on chromosome 15. But it comes in different strengths. A person with a weak form of the OCA2 gene will have blue eyes. Likewise a person with a strong form will have brown eyes. \n\nThe plot thickens, though, because an individual also has other eye-color genes that each has a say in the final eye-color outcome. For example, if one of these lesser genes is strong, it can make the weak form (blue) of OCA2 work much more effectively — almost like the strong form (brown). Then the eye color may be a light brown or muddy grey. In fact, the resulting color can be any shade of brown, hazel/green, or blue depending on the strengths of the interactions.\n\nSo, yes... two blue eyed parents can produce a brown eyed baby.
1041372
Green eyes are more rare.  There is not an actual gene for green eyes, protein differences cause some eyes to be green.
1128443
Eye color is a physical trait that is genetically determined. A favorite pastime for many expectant parents is documenting the eye color of grandparents and extended family members to attempt to predict the eye color of their baby. Any discussion of the inheritance of eye color, requires a review of genetics. In basic terms, eye color is determined by the amount of a pigment called melanin that is in the iris of the eye. Brown eyes have lots of pigment, blue eyes very little. The amount of pigment is determined by a number of genes controlling pigment production. Generally speaking, brown is dominant, meaning that if one parent has brown eyes and the other has blue eyes, the baby will most likely have brown eyes. But the situation is really much more complicated than that. For a more complete description, read on.
4964
A rarely good question asked in this section. The color reflected depends on the texture and size of particles in the back surface of the eyes of an animal. Some night vision animals have a better reflecting surface to point any light not captured by the retina back to its light-sensing cells. So light intensity varies, as well as color. The color is not always the same for a certain species in the sense that the color you perceive depends on the angle at which you look at their eyes (you might be able to see the whole spectrum of visible light in some cases).
1031311
Your dad carried one recessive gene for green eyes, which his gene for brown eyes was dominant, so he shows that he has brown eyes.  you got one recessive gene from your mother, and the recessive gene from your dad, making you show for recessive, making you have green-blue eyes. the same way worked for your son
853036
The cougar goes by many names - cougar, puma,\npanther, painter, mountain lion.  It is not the same\nthing as what is normally called a black panther,\nwhich is just a black leopard.  Normally colored\nleopards and black leopards can occur in the same\nlitter of cubs.  \n\nWith most animals occasional individuals may be\neither albino, white, or melanic, black.  This is due\nto alleles of color control genes, usually recessive\nalleles.  To show the recessive character both\nparents must be carriers of the recessive allele, and\neven when they both are only one fourth of the\noffspring will show the recessive color (if both\nparents are normally colored).  The frequency of\nthese color variants differs greatly in different kinds\nof animals.  Squirrels, for example, seem to have a\nhigh frequency of alleles for the melanic color.\nPopulations of black squirrels occur in a number of\nplaces.  Usually the melanic color is rarer than the\nalbino, but the reverse seems to be true of squirrels.\n\nI have never seen or heard of either an albino or a\nmelanic cougar, but they probably exist in very \nsmall numbers.  I don't know where in the Midwest\nyou are located, but in the eastern part of it, where\nI am, cougars are very rare and the only reports of\nblack panthers I have heard of were errors.  The\nperson reporting them had mistaken something\nelse for a black panther.  It is very easy to make\nsuch a mistake, especially when  you come upon\nsomething suddenly and unexpectedly.  There is\nno reason to be afraid of admitting a mistake. In\nfact it's better to say you were wrong then insist\nyou were right about something extremely unlikely.\nI used to do a lot of bird watching and often had\npeople insist that they had seen a bird that fit a\ncertain description when I knew very well there was\nno such bird in existence.  Seeing, unfortunately, is\nnot always believing, as has been demonstrated by\npsychologists and other people quite often.
838431
This is a genetic matter\nIt depends to you mother and father's eye chromosomes\nAt first humans they used to have brown eyes.\nWith mutations in chromosomes, colors like \nblue, green, black, hazel were developed.
375089
I have a Male Angora Cat named Bailey and his hair is black and white!! He is a Cool-Cat,lol!! Blonde or Brown,Hmmmm You did'nt give me a eye color,,Makes a Diff- to me. I prefer if the Man has brown hair, his eyes would be green or Hazel/green. If Blonde, A Sky Blue or Deep Blue---Yum!!
667533
It's because since girls have 2 X chromosomes and males only have one X then all the genes are going to try to fit in that one X chromosome the male has and that's where colorblindness comes in, the gene for colorblindness is more likely to appear in males' genes because they only have 1 X chromosomes.\nwell that's all I know hope I helped!
530826
Short answer: because a lot of brown eyed people carry around blue eyes in their genes. \n\nThe long, yet really unclear answer:\n\nDominance will depend largely on the number of VNTRs codominantly inherited from each parent.  A set of VNTRs is an allele.  \n\nOne thing first: brown eye = pigment production\n                 blue eye= no pigment production\n                 Green eyes= little pigment produced\n                 Shades of yellow to brown= depends on the   \n                 amount of pigment produced.\n\nThat brown eyes are more dominant than blue eyes simply means that the number of VNTRs (strength of the allele) to express pigmentation in the eye are more abundant than the no pigmentation allele, which could also be completely absent if both parents are homozygous dominant (AA) for the gene.  \n\nNow when an allele is Heterozygote (Aa), this means that pigment get expressed simply because it's there to express and the body ignores the rest, same as the homozygous dominant condition.  \n\nAnd here's the neat part.  In homozygous recessive (aa) there could be an infinite number of VNTRs for no pigmentation, which if inherited in large numbers could inhibit the pigmentation genes completely, and thus be heterozygous and still have blue eyes. \n\nGreen and yellow eyes are the result of a steady heterozygous condition where no set of genes are expressed more than the other, so only a little bit of pigment is expressed, making an interesting colour of eyes. \n\nI´m a bit foggy on the details on how VNTRs did the whole shenannigan, so don´t quote me on this.
997040
Eye color is a polyploid trait.  the actual genes occur on a couple of different chromosomes.  Sorry.  The human genome project has it mapped out which chromosomes they are my poster is at work.
646525
it is either X^cX^c or X^cY\n\nIf the subject is female, she must be homozygous recessive for colorblindness (which is a recessive X-linked trait). \n\nIf the subject is male, all he needs is the colorblindness trait on his only X chromosome. Males only inherit one X and one Y. colorblindness is never carried on the Y chromosome, so as long as he inherits it on the X, he will have it.\n\nThis is why men tend to be more subject to colorblindness than women. Women need to inherit two recessive genes for them to actually display the characteristic in their phenotype; men only need to inherit one. Even if women inherit one gene for colorblindness, they will not exhibit it, since it is recessive, so the dominant gene for color vision is displayed and she is a carrier for the trait. While she is not colorblind herself, she is still able to  pass the gene down to her offspring: even if she mates with a male with normal vision, any male offspring will have a 50% chance of being colorblind.
133907
No, there's loads of different shades/colours of eyes. Mine seem to change from light blue to green to dark blue
723382
First of all, eye color can change with age. Second, it's more complicated that the simple brown / blue description that they give in high school biology class. So I suspect that the answer is yes.