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2. A red-fruited tomato plant (which is dominant), when crossed with a yellow-fruited one, produces progeny about half of which are red-fruited and half which are yellow fruited. What are the genotypes of the parents?

Question

2. A red-fruited tomato plant (which is dominant), when crossed with a yellow-fruited one, produces progeny about half of which are red-fruited and half which are yellow fruited. What are the genotypes of the parents?

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Step 1

For every character, we have two alleles. If an allele masks the effect of another allele then it is termed as a dominant allele. And the masked allele is termed as a recessive allele.
For dominant phenotype to be expressed, we need either both the alleles to be dominant or one dominant and one recessive allele. Further, if we need recessive phenotype to be expressed then we need two recessive alleles on the same locus of that chromosome.

Step 2

According to the question, the red-fruited tomato plant is dominant in nature. So, the yellow-fruited plant must be recessive in nature. Further, the pro...

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