1 A population of wildflowers was scored for flower color Th

1. A population of wild-flowers was scored for flower color. There were 387 blue (BB) plants, 1790 violet (BR) plants and 793 red (RR) plants. Please round your answer correctly to 4 decimal digits.

(a) What is the frequency of the blue (B) allele?

________0.4316__________________

(b) What is the frequency of the red (R) allele? Please round your answer correctly to 4 decimal digits.

________0.5684_________________

(c) A chi-square test was conducted to test the hypothesis that the population genotypic frequencies are consistent with Hardy-Weinberg equilibrium frequencies.

Fill in the spaces below with the expected numbers for each phenotypic (genotypic) class in the chi-square test.

What is the expected number of blue (BB) plants? Please round your answer correctly to 4 decimal digits.

______561.9240________________

(d) What is the expected number of violet (BR) plants? Please round your answer correctly to 4 decimal digits.

_________1456.785____________

(e) What is the expected number of red(RR) plants? Please round your answer correctly to 4 decimal digits.

__________959.31____________

(f) Keeping all decimal digits during your calculations and rounding your answer to 3 decimal digits, what is the calculated chi-square value?

_______________________

(g) What is the number for the degrees of freedom?

__________________________

(h) What is the critical value? Round to two decimal places.

___________________________

(I) What is your conclusion from the chi-square test?

Select one: Fail to reject Ho or Reject Ho

Solution

observed no. expected no. (O-E) (O-E)2/E 387 561.9240 174 53 1790 1456.785 334 76 793 959.31 166 28 157 the calculated chi-square value...............157 number for the degrees of freedom..............(n-1) = 3-1 =2 critical value.........the critical value for two degrees of freedom............5.99 (I) What is your conclusion from the chi-square test?........... Fail The differences between observed and expected ratios is very high.