This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography, Subject name: Social & Preventive Medicine
Population genetics principle was given by? 
Select and explain. 
A. Hardy Weinberg, B. Sewall Wright, C. J. B. S. Haldane, D. R. A. Fisher
A: Hardy Weinberg
Answer: A: Hardy Weinberg 
Explanation: ANSWER: (A) Hardy WeinbergREF: Park 20th ed p. 730The Hardy-Weinberg principle provides the solution to how variation is maintained in a population with Mendelian inheritance. According to this principle, the frequencies of alleles (variations in a gene) will remain constant in the absence of selection, mutation, migration and genetic drift. The Hardy-Weinberg "equilibrium" refers to this stability of allele frequencies over time.A second component of the Hardy-Weinberg principle concerns the effects of a single generation of random mating. In this case, the genotype frequencies can be predicted from the allele frequencies.Factors influencing the gene pool:MutationNatural selectionPopulation movementsBreeding structurePublic health measures