Question

In tomato's, red fruit (R) is dominant over yellow fruit (r). What is the probability that an offspring of plants that are heterozygous (Rr) produce plants with the homozygous recessive (rr) genotype?

Answer 1

Answer:

1 out of 4

or

25%

Explanation:

First we draw a Punnett Square for this:

          R      r

   R    RR    Rr

   r     Rr     rr

So here we have the following genotypes possible for this cross:

RR = homozygous dominant

Rr = heterozygous dominant

rr = homozygous recessive

As you can see out of the four (4) possible outcomes, one (1) of them is rr. So the probability is 1 out of 4 chances or 25%.

Answer 2

In tomatoes, the probability is 1 out of 4 or 25% that an offspring of plants are heterozygous produce plants with the pure bread recessive genotype.

First, we draw a Punnett square for this:

    R      r

 R     RR    Rr

 r      Rr     rr

So, here we have the subsequent genotypes possible for this cross:

RR= pure bread dominant

Rr=Heterozygous dominant

rr=pure bread recessive

As you can see out of the four possible outcomes, one of them is rr, so the probability is 1 out of 4 the chances are 25%.

Thus, the probability is 1 out of 4 so the chances are 25% due to this the red fruit is dominant over yellow fruit in tomatoes.

Learn more about the heterozygous plants and pure bread recessive genotype here:

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