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Autosomal dominant pattern

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  • 03-11-2013 8:14pm
    #1
    nicowa
    Registered Users Posts: 700 ✭✭✭


    What's this mean? If my grandad had a gene for it and passed it on to my mum, what's the likelihood of me getting same gene. In general terms?


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    #2
    Ziphius
    Registered Users Posts: 714 ✭✭✭Ziphius


    In general, the probability of inheriting any one gene from a parent is 50%. There are some exceptions, such as genes on the sex chromosomes and mitochondrial genes which are inherited exclusively form the mother.

    Autosomal means the gene is located on a non-sex chromosome -- ie an autosome.


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    #3
    nicowa
    Registered Users Posts: 700 ✭✭✭nicowa


    So it's 50%? Ok. Thanks!


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    #4
    sudzs
    Registered Users Posts: 8,721 ✭✭✭sudzs


    nicowa wrote: »
    So it's 50%? Ok. Thanks!

    It's a 50% chance that your parent will inherit the dominant gene. So then you would have a 50% chance of inheriting it from your parent.

    So does that make it a 25% chance of inheriting the dominant gene from your grandparent??


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    #5
    Ziphius
    Registered Users Posts: 714 ✭✭✭Ziphius


    sudzs wrote: »
    It's a 50% chance that your parent will inherit the dominant gene. So then you would have a 50% chance of inheriting it from your parent.

    So does that make it a 25% chance of inheriting the dominant gene from your grandparent??

    Yes, this is correct. However, the OP wanted to know know the probability of inheriting the gene assuming that his/her mother already has it.


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