The Variation Of Inherited Traits Essay

708 Words Nov 30th, 2016 3 Pages
Introduction: The variation of inherited traits continues to prove fundamental to the concept of the evolution of all species, notably that of the human. This universal concept remains rooted in “genes, or more specifically the differences in the alleles carried by individuals in a population, [accounting] for heritable differences” (Leicht, McAllister 2016). More simply stated, this difference in alleles and their resulting impacts on heredity are referred to as genetic variation. These differences at the genomic level, specifically “in the sequence and arrangement of nucleotides in the DNA,” more so than any environmental factor, “[determine] the part of the phenotypic variation that has evolutionary consequences” (Leicht, McAllister 2016) within all populations, including that of the human.
Quantitative measurements of such evolutionarily influential genetic variation may by acquired through the application of the Hardy-Weinberg Principle. This application determines the expected frequencies of genotypes “given that a locus is polymorphic, meaning that is has at least two alleles segregating in the population” (Leicht, McAllister 2016). Nonetheless, the Hardy-Weinberg Principle, which “demonstrates that allele and genotype frequencies in a sexual population remain constant from generation to generation provided that only Mendelian segregation is at work,” (Leicht, McAllister 2016) has specific conditions that must be met or assumed to be met in order to pertinent. These…

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