Genetic Drift

Q. Genetic drift operates in :

1. Non reproductive population.
2. Slow reproductive population.
3. Small isolated population
4. Large isolated population

Q. Founders effect and bottleneck effect helps us to understand

1. gene migration
2. genetic drift
3. natural selection
4. mutation

Q.

Is genetic drift called natural selection?

Q.

Evolution takes place because of

1. acquired characters

2. genetic drift

3. phenotypic variation

4. overuse of organs

Q.

Is genetic drift affected by natural selection?

Q.

Genetic drift operates only in

1. Larger populations

2. Mendelian populations

3. Island populations

4. Smaller populations

Q.

Match the following:
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{p. Gene flow}& \text{i. Transfer of alleles from one population to another}\\ \text{q. Bottleneck effect}& \text{ii. A change in the frequency of alleles mainly}\text{due to chance events}\\ \text{r. Founder effect}& \text{iii. A sharp lowering of a population’s gene}\text{pool due to natural disasters}\\ \text{s. Genetic drift}& \text{iv. A few members of the original population}\text{colonise a new location away from the old}\end{array}$

1. p-i, q-ii, r-iii, s-iv

2. p-ii, q-i, r-iii, s-iv

3. p-i, q-iii, r-iv, s-ii

4. p-ii, q-iii, r-iv, s-i