law

abstract

：

Hardy-Weinberg law, also known as the law of genetic balance, mainly means that in an ideal state, the allele frequency and allele genotype frequency are genetically stable, that is, the gene balance is maintained. The ideal state should meet five conditions: ① there is enough population; ② Individuals in the population can mate randomly; ③ No mutation occurred; ④ No new genes were added; ⑤ There is no natural selection. At this time, the frequency of each gene and the frequency of each genotype have the following equation relationship and remain unchanged:

Let A=p and a=q, then A+a=p+q= 1, aa+aa+aa = p 2+2pq+q 2 = 1.

. Hardy-Weinberg law of equilibrium (Hardy-Weinberg

Balance)

For a large random mating population, gene frequency and genotype frequency will not be migrated, mutated and selected, but will remain unchanged.

Calculate the gene frequency of each gene when doing the problem, and then set a formula to calculate it.