A new mutation arises in a single, fertile individual in a population. Discuss h

Question

A new mutation arises in a single, fertile individual in a population. Discuss how and why each of the following might occur (note – each scenario has several potential environmental pressures or genetic characteristics that could occur. Describe TWO for each of these scenarios):

a) The mutation is lost from the population

b) The mutation slowly increases in the population

c) The mutation rapidly increases in the population.

d) The mutation spreads slowly and then maintains a low but stable level within the population.

Explanation / Answer

Answer a) the mutation is lost in the population : sometimes there are single nucleotide modification mutation occurs. But it does not show any changes in the phenotype of the individual. Because irrespective of the code change in the DNA the protein coded for it remains the same. So there is no effect and the mutation is lost.

C) mutation rapidly increases in the population : b genetic drift it has been seen that by mutation one whole allele could be deleted from a generation.

The brown coat color alleles B) is dominant over white coat color (b) . In 1st generation the two alleles occur with equal frequency 0.5 resulting probability of p and q as 0.5 .then half if the individual reproduce result in p as. 7and q as. 3

Two of second genera reproduce resulting in no alleles in the third generation

So very rapidly one allele is lost.

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