Hardy-weinburg Equilibrium :: essays research papers

The Hardy-Weinberg theorem states that the frequency of alleles and genotypes in a populations gene pool remain perpetual everywhere the multiplications unless acted upon by agents other than sexual recombination. For modelling, take a population of mice that consists of 1,000 members. A specific allele, albino allele, is recessive deep down this species. 80% of the population expresses the normal phenotype- cook coloring, part the remaining 20% are albino. 640 members of the population absorb the genotype AA, 320 have Aa, and 40 have aa. If completely random mating were to occur, there would be an 80% take place that a gamete would bear the normal allele, A, and a 20% chance that the gamete would bear the albino allele, a. The resulting offspring go out display the following genotype ratios AA depart have 64%, Aa 32% (the chance of the offspring having the A allele is 96%), and aa 4%. The offspring have the same genotype ratio as their parents. This example was one of Ha rdy-Weinberg equalizer. The next generation will express the same genotype ratio as their parents, and so on. But what exactly is postulate to work Hardy-Weinberg equilibrium? (Basically, a population in Hardy-Weinberg equilibrium s not evolving in any way.) Five specific factors are needed to force Hardy-Weinberg equilibrium within a population- a very large population, isolation from other populations, no net mutations, random mating, and no natural selection.The first element needed to create Hardy-Weinberg equilibrium is a very large population size. The larger the population, the less likely it is for genetic drift to occur. Genetic drift is a chance variation in the gene pool that may change the frequencies of alleles. A large population arouse better represent the gene pool of the preliminary generation than a small one. In order to completely eliminate all chances of genetic drift, a population would have to be infinitely large. Thus, we can fulfil here that perfec t Hardy-Weinberg equilibrium, which has no changes in the frequency of alleles, would require no genetic drift at all, and genetic drift itself is only come-at-able in a population of infinite size. There are two types of genetic drift- the bottleneck effect and the founder effect. Both severely decrease the variation within a population, altering the frequencies of alleles and thus making Hardy-Weinberg equilibrium impossible. If a disaster occurs in a population, killing off many members, the surviving members will not be representative of the original population.Hardy-weinburg Equilibrium essays research papers The Hardy-Weinberg theorem states that the frequency of alleles and genotypes in a populations gene pool remain constant over the generations unless acted upon by agents other than sexual recombination. For example, take a population of mice that consists of 1,000 members. A specific allele, albino allele, is recessive within this species. 80% of the population expres ses the normal phenotype- brown coloring, while the remaining 20% are albino. 640 members of the population have the genotype AA, 320 have Aa, and 40 have aa. If completely random mating were to occur, there would be an 80% chance that a gamete would bear the normal allele, A, and a 20% chance that the gamete would bear the albino allele, a. The resulting offspring will display the following genotype ratios AA will have 64%, Aa 32% (the chance of the offspring having the A allele is 96%), and aa 4%. The offspring have the same genotype ratio as their parents. This example was one of Hardy-Weinberg equilibrium. The next generation will express the same genotype ratio as their parents, and so on. But what exactly is needed to create Hardy-Weinberg equilibrium? (Basically, a population in Hardy-Weinberg equilibrium s not evolving in any way.) Five specific factors are needed to create Hardy-Weinberg equilibrium within a population- a very large population, isolation from other populati ons, no net mutations, random mating, and no natural selection.The first element needed to create Hardy-Weinberg equilibrium is a very large population size. The larger the population, the less likely it is for genetic drift to occur. Genetic drift is a chance fluctuation in the gene pool that may change the frequencies of alleles. A large population can better represent the gene pool of the previous generation than a small one. In order to completely eliminate all chances of genetic drift, a population would have to be infinitely large. Thus, we can see here that perfect Hardy-Weinberg equilibrium, which has no changes in the frequency of alleles, would require no genetic drift at all, and genetic drift itself is only possible in a population of infinite size. There are two types of genetic drift- the bottleneck effect and the founder effect. Both severely decrease the variability within a population, altering the frequencies of alleles and thus making Hardy-Weinberg equilibrium im possible. If a disaster occurs in a population, killing off many members, the surviving members will not be representative of the original population.