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suppose a researcher performed an experiment to determine the number of genes affecting fruit size in tomatoes. she crossed the domestic tomato, lycopersicon esculentum, and the wild species, lycopersicon cheesmanii, for two generations to obtain f2 individuals. consider the table, which reports the fruit diameter and number of offspring obtained by the researcher in the f2 generation. in the parental lines, l. cheesmanii had a fruit diameter of 9 cm9 cm and l. esculentum had a fruit diameter of

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From the table, it appears that there are at least two genes affecting fruit size in tomatoes.

The first gene appears to affect the fruit size in the F2 generation, as the offspring with a fruit diameter of 6 cm are likely the result of one gene present in L. esculentum and one gene present in L. cheesmanii.

The second gene appears to affect the fruit size in the F2 generation, as the offspring with a fruit diameter of 8 cm are likely the result of two genes present in L. cheesmanii. Furthermore, the data suggest that there may be more genes affecting fruit size in tomatoes, as the researcher observed offspring with fruit diameters other than 6 cm and 8 cm in the F2 generation.

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