Why do you need to use a statistical test (e.g., the chi-square test) to compare the observed genotype frequencies in a population to those expected under Hardy-Weinberg equilibrium?
A) to distinguish between natural selection and other factors that could cause a population to deviate from Hardy-Weinberg equilibrium
B) because it is impossible to know what the observed genotype frequencies are in a population
C) to assess whether the deviation of observed from expected frequencies is likely due to chance
D) because the frequencies expected under Hardy-Weinberg equilibrium are not accurate

Question

Quizplus · Accepted Answer

A statistical test is necessary to assess the probability that the deviation of observed genotype frequencies from those expected under Hardy-Weinberg equilibrium occurred due to chance. This helps to distinguish between natural selection and other factors that could cause a population to deviate from equilibrium. Option B is incorrect as the observed genotype frequencies can be determined through sampling. Option D is incorrect as the frequencies expected under Hardy-Weinberg equilibrium are accurate if the assumptions of the model are met.

Why Do You Need to Use a Statistical Test (E