In a tomato plant weight of tomato controlled by 3 pair of allele in a cumulative manners. Tomato plant with genotype XXYYZZ is 60 gm on the other hand tomato plant with genotype xxyyzz is 30 gm. What will be the contribution of one dominant gene and weight of tomato in a plant with genotypeXxyyZZ respectively.

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Please find below the solution to the asked query        

If the weight of tomato plant with genotype XXYYZZ is 60g, then this indicates that each dominant gene (XX, YY and ZZ) contributes 20g to the tomato weight. Each dominant allele (X, Y and Z) contributes 10g to tomato weight.
Weight of tomato with genotype XxyyZZ would be 45g (i.e. 15g from Xx, 10g from yy and 20g from ZZ).

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