Question

Genetic drift
A) Is random change in gene frequency.
B) Has nothing in common with inbreeding.
C) Is an orderly change in gene frequency.
D) Produces greatest fluctuations in large populations.

Answer 1

Mutations within the DNA can have no impact on an organism’s health. In a population, these variations in genetics will decrease or increase, merely due to chance.

Complete answer:
First we should know about genetic drift to answer this question. In smaller populations of organisms, genetic drift is much more probable. If the population is small and there are multiple alleles, some of the alleles in the population will easily become defined or extinct. When a population has many organisms, there is less risk of missing an entire allele because there are many organisms bearing the allele and it is less probable that they will all be wiped out.
Now, let us find the solution from the options-

Due to random selection, genetic drift is the changes in gene frequencies in a population.
In a population, where the allele itself is not responsible for changing in its frequency, genetic drift acts on the allele.
It is one of evolution 's basic mechanisms.

Thus, the correct answer is option (A) Is random change in gene frequency.

Note: It's easy to confuse genetic drift with natural selection. Whether or not the allele is directly involved in the transition of allele frequencies is the difference. If the allele affects an individual in a manner that allows the DNA to replicate further, the frequency of the allele will increase. It will decrease if it causes harm. This is caused by the direct influence of the allele on the organism and the environment and this is said as natural selection. In genetic drift, the allele is increased or reduced merely because it was found among the random populations that survived.