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5 September, 00:52

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)
  1. 5 September, 01:47
    0
    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).
  2. 5 September, 02:29
    0
    I believe it would be Rr as the red is dominant over the yellow as they are the recessive gene creating the Rr.
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