In tomatoes, one gene determines whether the plant has purple (G) or green (g) s

ID: 198659 • Letter: I

Question

In tomatoes, one gene determines whether the plant has purple (G) or green (g) stems, and another locus determines whether the leaves are "cut" (P) or "potato" (p). A true-breeding plant with purple stem and cut leaves is crossed with a true-breeding plant having green stem and potato leaves. The F plants are then allowed to self-pollinate. The F2 generation consisted of 310 plants with purple stem, cut leaves; 31 plants with gren stem, potato leaves; 120 plants purple stem, potato leaves; and 129 plants with green stem,cut laves Using the chi-square tes, determine if this outcome is consistent with the predicted ratios for this cross. Provide the null and alternative hypotheses, chi-square statistic, P-value, and a conclusion. (10 pts)

Explanation / Answer

Null hypothesis: The observed values are not deviating from the 9:3:3:1 ratio.

Altenative hypothesis : The observed values are deviating from the 9:3:3:1 ratio.

Test static – Chisquare test:

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In tomatoes, one gene determines whether the plant has purple (G) or green (g) s

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