Question

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.

Answer 1

Answer:

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%.