Eyes color

Discussion in 'Biology & Genetics' started by Orleander, Mar 28, 2008.

  1. Orleander OH JOY!!!! Valued Senior Member

    Messages:
    25,817
    I have a question about eye's color. If my Mom had blue eyes and my Dad had brown eyes, why couldn't I be born with 1 blue eye and 1 brown eye. In all the ways humans can be born messed up, why isn't this one way?
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. Asguard Kiss my dark side Valued Senior Member

    Messages:
    23,049
    Because eye colour is set by your DNA and blue is a submissive gene therfor its over ruled by the brown gene in BOTH cases (and in your hair and your skin colour ect). You will be a carrier of the blue eye gene so if you have sex with a man with blue eyes 1/2 of your children SHOULD have blue eyes but you cant have one of each as far as i know

    CATS on the other hand CAN have one green eye and one blue eye but i dont know why
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. Orleander OH JOY!!!! Valued Senior Member

    Messages:
    25,817
    I know all that. But its also in our genes to have 2 arms and 2 legs. Some kids are born without. So, why can't eye genes be messed up?
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. whitewolf asleep under the juniper bush Registered Senior Member

    Messages:
    3,112
  8. Orleander OH JOY!!!! Valued Senior Member

    Messages:
    25,817
    I'll be damned! Thanks! I know David Bowie does as well, but he wasn't born that way. Do you know if she was or it was damaged after birth (like Bowie)
    And again, thanks!
     
  9. 15ofthe19 35 year old virgin Registered Senior Member

    Messages:
    1,588
    Orly, if only I could gaze into your eyes, all questions would be answered.

    Please Register or Log in to view the hidden image!



    And fwiw, I have the bluest eyes you'll ever want to see, and my daughter got em too.
     
  10. whitewolf asleep under the juniper bush Registered Senior Member

    Messages:
    3,112
    I have no idea. I also remember there was an actress with purple eyes.... Was it Lizzie Taylor?

    My mom's eyes are green and my dad's are blue, my irises are a mix: blue on the outside and green on the inside near the pupils. But genes for both green and blue are recessive.
     
  11. Asguard Kiss my dark side Valued Senior Member

    Messages:
    23,049
    question, is red hair greeen eyes impossable?
     
  12. whitewolf asleep under the juniper bush Registered Senior Member

    Messages:
    3,112
    I don't see why it would be impossible.

    Please Register or Log in to view the hidden image!

     
  13. clusteringflux Version 1. OH! Valued Senior Member

    Messages:
    2,760
  14. Asguard Kiss my dark side Valued Senior Member

    Messages:
    23,049
    I was wondering which eye colour redhair is associated with?

    I mean red hair green eyes is REALLY hot on a girl but the only time i have seen it is when either a girl colours her hair or has green contacts so im wondering

    Please Register or Log in to view the hidden image!

     
  15. Blindman Valued Senior Member

    Messages:
    1,425
    My sister has one blue eye and one eye that is half brown and half blue.
     
  16. whitewolf asleep under the juniper bush Registered Senior Member

    Messages:
    3,112
    It is just part of the eye, but I don't think it's the sort of thing like a birth mark. Birth marks are on skin and may come and go.
     
  17. Anti-Flag Pun intended Registered Senior Member

    Messages:
    3,714
    It's the way DNA works, like asguard says they should both be the same color, but there's always heterochromia. It's not as uncommon as people think.
     
  18. Karizma Registered Member

    Messages:
    9
    I have green eyes and red hair. and I know someone who has a green eye and a brow one. it happens sometimes I guess. Genetic mutations
     
  19. dexter ROOT Registered Senior Member

    Messages:
    689
    A simple punnett square will reveal the 1:2:1 ratio.

    To understand this, you must first understand that in sexual reproduction(meiosis)[most animals, including humans], we have 2 alleles (possibilities) for every gene expressed [x-linked dismissed]. when these get crossed, the traits can be primarily dominant or recessive (others like co-dominance exist). Depending on the combination, the dominant will get expressed if available. If you are crossing 2 heterozygous individuals for a single gene, you will get the 1:2:1 ratio of genetic makeup. This is just probability because genes cross independently. This means that 1/4 offspring will be Dominant, Dominant, 2/4 will be dominant, recessive (expressing dominant), and the last 1/4 will be recessive, recessive.

    the expression of heterozygous phenotypes in eyecolor, such as this case, would probobly be due to mutation.
     
  20. ElectricFetus Sanity going, going, gone Valued Senior Member

    Messages:
    18,142
    Although I have has several genetics classes I'm not a geneticist but I'll try:

    Eye color: Brown is dominate over blue (produced melanin ), green and gray.

    Hair color: Black dominates brown (produces most eumalanin), brown dominates blond and red.

    - neither hair, skin or eye color genes need be connected, though in some cases such as the freckled redheads and albinos a defect in all melanin production affects their hair, eye and skin coloration

    - Genes for arms and legs and most other morphology are controlled by hox genes and are bilaterally symmetric: there is no right hand gene and left hand gene, no right eye gene and no left eye gene.

    - Differing eye color in a person is caused by mosaicism, in rare cases chimaerism.
     
  21. Fraggle Rocker Staff Member

    Messages:
    24,690
    Yes. Elizabeth Rosemond Taylor is still alive at 76.
     
  22. temur man of no words Registered Senior Member

    Messages:
    1,330
    Great woman
     
  23. S.A.M. uniquely dreadful Valued Senior Member

    Messages:
    72,822
    I used to think David Bowie had different colored eyes, but later found out that one is permanently dilated due to a childhood fist fight injury.

    Please Register or Log in to view the hidden image!



    Makes him look like he has one blue and one brown eye if you see it at a distance
     

Share This Page