Test the hypothesis that those genes are assorting independently using a chi-squ

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In corn, a dihybrid for the recessives a and b is testcrossed. The distribution of the phenotypes is as follows:

            AB  122

            Ab  118

            aB     81

            ab     79

            Test the hypothesis that those genes are assorting independently using a chi-square test. Explain tentatively any deviation from expected values, and tell how you would test your explanation.

Sep 27th, 2015

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Ho: genes are assorting independently

Ha: genes are not assorting independently

alpha=.05

test stat: Chi-square

CV: 7.81 df=3

computation of  test stat:  Chi-square = (122-100)^2/100+ (118-100)^2/100  +(81-100)^2/100 + (79-100)^2/100=16.10

Reject Ho since computed Chi-square > 7.811

Conclusion: there is enough evidence that genes are not assorting independently

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Sep 28th, 2015

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