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Homework Help: Genetics Questions

  1. Oct 9, 2007 #1
    I am not sure how to go about solving this:

    1. The problem statement, all variables and given/known data

    A true breeding bird species shows yellow tail feathers in the adults (determined by the y+ allele at tail feather locus) and long beaks (b+ allele at beak length locus). On a Pacific Island, a new strain is discovered that is true breeding for orange tail feathres (yo allele) and short beaks (bs allele) when the new birds are interbred with the normal birds, it is discovered that the two genes are linked and the genetic map distance between the two genes is determined to be 8%.

    A breeder would like to obtain a strain of orange tail and long beak birds, and crosses the two original strains. In the F1 birds with partners from the orange tail, short beak strain. He would like to obtain somewhere around ten F2 birds with the desired orange tail, long beak phenotype in order to be able to eventually establish a new truebreeding line of these birds. How many progeny should he grow up to obtain an expected number of ten birds with the desired combination of alleles?
  2. jcsd
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