A scientist is studying a population of lizards with three different color phenotypes. The color phenotype is controlled by a single gene with two alleles: an incompletely dominant allele A and a recessive allele a. The scientist collected data on the color of 100 lizards. The data are shown in the table. RED AA 75PURPLE Aa 15BLUE aa 10 To test the hypothesis that the population is at Hardy-Weinberg equilibrium, the scientist performed a chi-square test. Which of the following values is closest to the chi-square value the scientist calculated? a) 0.1 b) 1.9 c) 18.3 d) 23.1
A scientist is studying a population of lizards with three different color phenotypes. The color phenotype is controlled by a single gene with two alleles: an incompletely dominant allele A and a recessive allele a. The scientist collected data on the color of 100 lizards. The data are shown in the table. RED AA 75
PURPLE Aa 15
BLUE aa 10 To test the hypothesis that the population is at Hardy-Weinberg equilibrium, the scientist performed a chi-square test. Which of the following values is closest to the chi-square value the scientist calculated?
a) 0.1
b) 1.9
c) 18.3
d) 23.1
Answer
Answer: c) 18.3
Explanation: The chi-square test evaluates how well observed genotype frequencies match expected frequencies under Hardy-Weinberg equilibrium. Given the large discrepancy between observed and expected values in the provided data, a chi-square value around 18.3 is consistent with significant deviations from equilibrium.
Sourav
