Question

Flower color in a diploid plant is governed by a single gene with 2 alleles (C^R and C^W). Inheritance of flower color follows a pattern of simple Mendelian genetics with dominance.

Scoring of 1850 plants gives the following data:

Flower Color                 Genotype    Number

Red    C^RC^R   467

Red                                     C^RC^W      946

White                                  C^WC^W      437

a) The allelic frequency of C^R is [A] (enter your answer as a decimal rounded to three significant figures after the decimal, in the form '0.xyz'; be sure to round off correctly).

b) The allelic frequency of C^W is [B] (enter your answer as a decimal rounded to three significant figures after the decimal, in the form '0.xyz'; be sure to round off correctly).

Now, assume that this population is in Hardy-Weinberg (H-W) equilibrium at the flower color locus.

c) Under the assumption of H-W equilibrium, the expected frequency of dominant homozygotes with red flowers under is [C] (enter your answer as a decimal rounded to three significant figures after the decimal, in the form '0.xyz'; be sure to round off correctly).

d) Under the assumption of H-W equilibrium, the expected frequency of heterozygotes with red flowers is [D] (enter your answer as a decimal rounded to three significant figures after the decimal, in the form '0.xyz'; be sure to round off correctly).

e) Under the assumption of H-W equilibrium, the expected frequency of recessive homozygotes with white flowers is [E] (enter your answer as a decimal rounded to three significant figures after the decimal, in the form '0.xyz'; be sure to round off correctly).

A chi-square goodness-of-fit test is performed, The chi-square statistic = .898 and the P value is between 0.5 and 0.1.

f) This population of plants [F] in Hardy-Weinberg equilibrium (enter either 'is' or 'is not' in the space provided).

Answer 1

Calculate the allelic frequency, genotypic frequency, and chi-square to find if population is in Hardy-Weinberg equilibrium or not, as shown below:-

Therefore, the population is in Hardy-Weinberg equilibrium.