6. A population has a homozygous recessive genotype (aa) of 36%. Calculate the following (show your work): a. the frequency of the aa genotype b. the frequency of the 'a' allele_ c. the frequency of the 'A' allele_ d. the frequency of the dominant phenotype_ You need to show your work to get full credit. HINT! The dominant phenotype is made out of 2 different genotypes AA and Aa
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Introduction :
In the absence of other evolutionary factors like gene migration or gene flow, genetic drift, mutation, genetic recombination, and natural selection, the Hardy-Weinberg principle states that the allele frequencies in a population are stable and remain constant from generation to generation. The equations for Hardy-Weingberg principle/law are ;
p + q = 1 and p² + 2pq + q² = 1
where,
p = frequency of dominant allele
q = frequency of recessive allele
p² = frequency of homozygous dominant genotype
2pq = frequency of heterozygous genotype
q² = frequency of homozygous recessive genotype
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