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algebra

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Cystic fibrosis is inherited from parents only if both have the abnormal CF gene. Children of two parents with the CF gene will either be affected with the disease, a carrier but not affected or not have the gene.
-Write an expression for the genitec makeup of children of two parents that are carriers or cystic fibrosis.
-What is the probability that a child will not be affected and not be a carrier?

  • algebra -

    This looks more like genetics than algebra.

    Let N = normal gene and c = cystic fibrosis gene.

    Assuming that both parents are carriers — they carry the gene but do not have CF — both of their genotypes would be Nc.

    Use a Punnett square to determine probabilities.

    http://en.wikipedia.org/wiki/Punnett_square

    I hope this helps. Thanks for asking.

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