Genetic drift operates in:

1. small isolated population

2. large isolated population

3. non-reproductive population

4. slow reproductive population

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by?

1. p²

2. 2pq

3. pq

4. q²

In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is:
1. 0.4
2. 0.5
3. 0.6
4. 0.7

Variation in gene frequencies within populations can occur by chance rather than by natural selection. 
This is referred to as:

1. Genetic drift

2. Random mating

3. Genetic load

4. Genetic flow