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Homework Help: Recombination question

  1. Mar 18, 2010 #1
    Confused on 2 questions here

    If a recombination frequency between two genes is 1.5%, what is the distance between the genes in map units on the linkage map?

    a. Impossible to determine, because the interference is not known.
    b. 1.5
    c. 3
    d. 0.75

    Recombination frequencies

    a. arise from completely random genetic exchange.
    b. are the same for all genes.
    c. decrease with distance.
    d. are the same for cis and trans heterozygotes.

    My answers (one or both are wrong but I can't tell because they questions are grouped in pairs)

    b. Each % frequency of recombination equals one map unit between the genes. So 1.5% recombination frequency = 1.5 map units apart will result in 1.5% recombination

    a. It can't be (b), because genes are all distances apart; it can't be (c), because frequencies increase with increasing distance; it can't be (d), because the distance between genes is the same whether the alleles are cis or trans loci. So I thought it was a.
  2. jcsd
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