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Thread: genetics problem, can anyone help?

  1. #1 genetics problem, can anyone help? 
    Forum Freshman
    Join Date
    Sep 2007
    Posts
    10
    Given that loci A and B in Drosophila are sex-linked and 20 map units apart, what phenotypic frequencies would you expect in male and female offspring resulting from the following crosses? (Assume A and B are dominant to a and b, respectively).

    A) AaBb (cis) female X ab/Y male
    B) AaBb (trans) X ab/Y male
    C) aabb female X AB/Y male


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