To assess Mendel’s law of segregation using tomatoes, a true-breeding tall varie

Question

To assess Mendel’s law of segregation using tomatoes, a true-breeding tall variety (SS) is crossed with a true-breeding short variety (ss). The heterozygous F1 tall plants (Ss) were crossed to produce two sets of F2 data, as follows. What is the chi square value for set II? Enter your answer to two decimal places. Can the numbers produced in Set II be attributeable to chance? Answer yes or no. Your answer should look like the following: (a number of three significant figures, a semicolon, and either yes or no)

Set II: 750 tall 210 short

Explanation / Answer

Observed numbers: 750 tall 210 short
Expected ratio 3/4 1/4
Expected numbers: 720 tall 240 short
O-E 30 -30
(O-E)2= 900 900
(O-E)2/E 1.25 3.75
Chi square= 5

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