Mendel studied pea plants dihybrid for seed shape (round versus wrinkled) and seed color (yellow versus green). Recall that the round

I found the whole exercise on the internet. Attached is an image of the table and the labels. The round (R) and yellow (Y) alleles are dominant over the wrinkled (r) and green (y) alleles. The F1 is resultant from a self-parented crossing.For plant 1, the parent phenotype is the white label with a green and round pee, and the parent genotype is the blue label with "Rryy". The parent has this genotype and, therefore, phenotype because in order to only have offspring that are green it means that both alleles that are being carried by the parent for the colour are recessive, and in order to have offspring that are round and wrinkled the parent must have one allele that's for round shape and one allele that's for wrinkled shape. For plant 2, the parent phenotype is the white label with a yellow and round pee, and the parent genotype is the blue label with "RrYy". The parent has this genotype and, therefore, phenotype because in order to have offspring that are green and yellow it means that the parent must have one allele that's for green colour and one allele that's for yellow colour, and in order to have offspring that are round and wrinkled the parent must have one allele that's for round shape and one allele that's for wrinkled shape. For plant 3, the parent phenotype is the white label with a yellow and round pee, and the parent genotype is the blue label with "RRYy". The parent has this genotype and, therefore, phenotype because in order to have offspring are green and yellow it means that the parent must have one allele that's for green colour and one allele that's for yellow colour, and in order to only have offspring that are round it means that both alleles that are being carried by the parent for the shape are dominant. For plant 4, the parent phenotype is the white label with a green and wrinkled pee, and the parent genotype is the blue label with "rryy". The parent has this genotype and, therefore, phenotype because in order to only have offspring that are green it means that both alleles that are being carried by the parent for the colour are recessive, and in order to only have offspring that are wrinkled it means that both alleles that are being carried by the parent for the shape are recessive.

The ability to deduce an organism's genotype from the phenotype(s) of its progeny is an important skill in solving genetics problems. In this example, the logic was simplified because the parent plants were selfed, and therefore only one parental genotype was involved.