CHI-SQUARE ANALYSIS
CHI-SQUARE ANALYSIS a. In the example of chi-square determination in Table 34.6, what is the hypothesis being tested? Would the hypothesis be supported by a chi square of 3.952? Yes b. Record your results of the monohybrid cross and do a chi-square analysis of your results in the following table. CHI-SQUARE ANALYSIS OF PROGENY FROM A MONOHYBRID CROSS Actual Expected Phenotype Results Results Deviation (d) (d2 ) ( d2 / e ) Purple flowers 78 75 3 9 / 75 = 0.12 22 25 3 9 White flowers 9/ 25= 0.36 Eld2/ el = 0.48 x 2 = 0.48 p falls between and Is the hypothesis supported? Yes c. Record your results of the dihybrid cross and do a chi-square analysis of your results in the following table. CHI-SQUARE ANALYSIS OF PROGENY FROM A DIHYBRID CROSS Kernel Actual Expected Phenotype Results Results Deviation (d) (d2/ e) Smooth-yellow Smooth-white Shrunken-yellow Shrunken-white Eld / e) = x 2 = p falls between and Is the hypothesis supported? d. Biologists like to have a large number of progeny to analyze when doing genetic crosses. Why is this of value? B/c in genetics , a genetic cross or test is introduced by Gregor Mendel,involves the breeding of an individual e. Indicate the chi-square values and parental genotypes for the corn ears from experimental crosses. Ear No. Chi Square Parental Genotypes
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