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.

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%.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

answer; ////increased water pollution; ///////////////////////