Biology - CBSE Class 12 Sample Paper for 2023 Boards - Solutions

Biology Class 12
Solutions to CBSE Sample Paper - Biology Class 12

## (b) List any two factors that can disturb the genetic equilibrium.

1. Sum Total of All the Allele Frequencies is 1: Let there be two alleles A and a in a population. The frequencies of alleles A and a are ‘p’ and ‘q’ respectively. The frequency of AA individuals in a population is p 2 and it can be explained that the probability that an allele A with a frequency of p would appear on both the chromosomes of a diploid individual is simply the product of the probabilities, i.e., p 2 . Similarly, the frequency of aa is q 2 and that of Aa is 2pq.p 2 + 2pq+q 2 ) = 1,where p 2 represents the frequency of homozygous dominant genotype, 2pq represents the frequency of the heterozygous genotype and q 2 represents the frequency of the homozygous recessive.
2. Factors that affect Hardy–Weinberg equilibrium:
1. Gene migration or gene flow
2. Genetic drift
3. Mutation
4. Genetic recombination
5. Natural Selection

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class 