In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed with a plant that has yellow fruit. What will be the genotype and phenotype of the offspring?

Question

Brooke Tate

Biology

31 January, 02:12

In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed with a plant that has yellow fruit. What will be the genotype and phenotype of the offspring?

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Answers (2)

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Peppermint · Answer 1

Genotype = 4Rr or 100% Rr

Phenotype = All (100%) red fruit

Explanation:

Red fruit allele = R, homozygous red fruit = RR

Yellow fruit allele = r, yellow fruit = rr (since R is dominant over r, only rr can result in yellow fruit)

RR x rr = Rr, Rr, Rr, Rr = 4Rr

Genotype of offspring = 4Rr or 100% Rr

Phenotype of the offspring = All (100%) red fruit since red fruit (R) is dominant over yellow fruit (r).

Jovanny Wu · Answer 2

I believe it would be Rr as the red is dominant over the yellow as they are the recessive gene creating the Rr.