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Explain the genetics of skin colour? watch

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    Hm, my boyfriend has this gorgeous light brown skin (kind of mid brown now he has a tan) and dark hair, and basically he has really complicated heritage but to sum up, his mother has all British ancestors, his dad's dad was Irish/Armenian I think and his dad's mum was Portuguese/Irish and darker than the dad. My boyfriend's dad is a lot lighter than him though, kind of Iranian looking, so is his sister, so I'm thinking is there any possibility that the genes for dark skin can be recessive?
    Also, if by some crazy chance we end up marrying and having kids, will they turn out light but the grandkids are darker?:p:

    Sorry, I'm a biologist and find genetics fascinating
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    I don't know nearly enough about genetics, but surely if it was a recessive gene, he'd need two copies of it to have darker skin, which he isn't getting from his mum? So it must be dominant...

    Bear in mind I haven't done genetics since I was in yr 11, lol
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    I am blonde with greeny blue eyes.

    Parents are dark haired, brown eyes and tan easy, my brother is also exactly like them. Cannot find anyone in the family like me, family gatherings are mind bogggling.

    I FAIL.

    I guess I am living proof that DNA FAILS. Hah I joke, I wouldn't like to take on science
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    (Original post by Cupcakee)
    I am blonde with greeny blue eyes.

    Parents are dark haired, brown eyes and tan easy, my brother is also exactly like them. Cannot find anyone in the family like me, family gatherings are mind bogggling.

    I FAIL.

    I guess I am living proof that DNA FAILS. Hah I joke, I wouldn't like to take on science
    Haha that's pretty cool.
    My dad has blue eyes, my mum and sis have brown and I end up with green like my nan :p:
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    The weirdest thing is that in pics of him when he was little, he looks...well completely white lol, so I don't know if he's just seriously tanned atm or what! (we haven't been together so long lol)
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    lol
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    Remember that skin colour is a polygenic trait - it is controlled by more than one gene. I expect there are tens, maybe hundreds of genes affecting it which explains the existence of the many variations possible. I expect that some of these genes are recessive, and some are dominant.
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    (Original post by Deadly Lightshade)
    We're all thinking it...
    I am not adopted. Mum has lots of baby pictures of me with all of them...maybe they borrowed a small blonde girl for the pictures..Also my mum is a bit of a worrier and wouldn't let the hospital take me away from her after I was born, there were some awful stories around that time of 'baby swaps' where babies got mixed up! :woo:
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    if i remember rightly ( correct me if i'm wrong) the genes for skin colour are neither recessive or dominant but are expressed as a mixture of the parents genes (there is a special name for that kind of gene but i can't remember it) e.g if a red rose and a white rose cross pollinated they would produce pink roses.
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    these like 4-6 genes all operate under incomplete dominance, each gene comes in several alleles

    these are cases like this, there have been cases where black parent, have had white kids

    which every gene gets switched on, do you get crossing over when the cell divide down into the gametes, you have environmental factors

    you can write books on this stuff
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    (Original post by Kimbo99)
    if i remember rightly ( correct me if i'm wrong) the genes for skin colour are neither recessive or dominant but are expressed as a mixture of the parents genes (there is a special name for that kind of gene but i can't remember it) e.g if a red rose and a white rose cross pollinated they would produce pink roses.
    that's pretty much what incomplete dominance
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    (Original post by robinson999)
    these like 4-6 genes all operate under incomplete dominance, each gene comes in several alleles

    these are cases like this, there have been cases where black parent, have had white kids

    which every gene gets switched on, do you get crossing over when the cell divide down into the gametes, you have environmental factors

    you can write books on this stuff
    aha...yeah I remember reading that a black couple had white babies, or the other way round, crazy! I guess you just don't know what's going to pop out, do you?
    And thanks
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    (Original post by missaphrodite)
    aha...yeah I remember reading that a black couple had white babies, or the other way round, crazy! I guess you just don't know what's going to pop out, do you?
    And thanks
    no real way of telling, it be a bit of a shock, sort of thing you won't think will happen, until it happens

    you can prob look at the genetic make up of the unborn, as you pretty much know which gene should be where, its just something your think will never happen
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    I'm white, so pale.
    My mom is from far east Asia.
    My brother is white but tans well, so he's always tanned. Takes after my Italian dad.
    Really I shouldn't be soooooo white, let alone white at all.
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    (Original post by Pinball_heart)
    I'm white, so pale.
    My mom is from far east Asia.
    My brother is white but tans well, so he's always tanned. Takes after my Italian dad.
    Really I shouldn't be soooooo white, let alone white at all.
    East Asian and Italian? That is an amazing combination! :love:
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    (Original post by missaphrodite)
    East Asian and Italian? That is an amazing combination! :love:
    Oh and you're tall and gorgeous! I could not be more envious lol
 
 
 
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