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6 August, 13:06

an individual has th gentype DdTt with one chromosome containing the D and T alleles and the homologous chromosome cantaining the d and t alleles. if the genes are linked with a map distance of 26 cm, what percentage of teh gametes from this inddividual will contain the D and t alleles.

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  1. 6 August, 13:25
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    13%.

    Explanation:

    1. As given, An individual has genotype DdTt

    One chromosome contain D and T allele and homologous have d and t alleles.

    2. So here, DdTt is divided by meiosis and produce four gametes having DT, Dt, dT and dt.

    As given, map distance is 26 cm, means total recombination frequency is 26%,

    So total recombinant gametes are 26%

    3. Non-recombinant or Parental gametes are DT and dt.

    total recombinant gametes are Dt and dT.

    So, the percentage of gametes containing Dt allele is = total reombinant/2 = 26/2

    13%.
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