Genetic drift is change of 

1. gene frequency in same generation 

2. appearance of recessive genes

3. gene frequency from one generation to next 

4. None of the above

Random genetic drift in a population probably results from   

1. large population size

2. highly genetically variable individuals

3. interbreeding within small isolated population 

4. constant low mutation rate

Genetic drift operates in 

1. small isolated population

2. large isolated population

3. fast reproductive population

4. slow reproductive population

In genetic drift, the term "genetic bottleneck" means:

1. reduction in allele frequencies or richness

2. random change in allele frequency by chance alone

3. sudden increase in the number of individuals

4. reproductive isolation of the population

Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?

(1) Transduction

(2) Chromosomal aberrations

(3) Genetic drift

(4) Recombination

The random changes in the allele frequency occurring by chance is termed as

1. genetic variability

2. genetic drift

3. gene migration

4. mutation

Genetic drift operates only in

1. island population 

2. smaller population 

3. larger population

4. none of these.

A population of an animal is hunted down to only 20 organisms. Later the number is restored to 10,000 organisms, but the variations in this population are highly reduced. This is called:

1. Founder Effect

2. Bottleneck effect

3. Edge effect

4. Heterosis

A plant population that reproduces by self - pollination is an extreme example of :