Question

WHOEVER RESPONDS FIRST WILL BE MARKED BEST.
The allele for red tomatoes (R) is dominant over the allele for yellow tomatoes (r). A farmer crosses a red tomato plant with a yellow tomato plant, and only red tomato plants are produced
Which of the following explains why no yellow tomato plants were produced?
A. Plants near the parent plants prevented the growth of yellow tomatoes.
B. Alleles for both red and yellow tomatoes were passed from the parent plants to the offspring, but only red was expressed.
C. The soil in which the parent plants grew prevented the growth of yellow tomatoes.
D. Only the allele for red tomatoes was passed down from the parent plants to the offspring, so that was the only color expressed.

Answer 1

Answer:

B.

The red allele is a parent allele, and capital R also represents a dominant allele. Lowercase r is recessive, meaning it will not be the dominant allele color. So for this, I would pick B. because it's not that there aren't any yellow tomato genes being passed down, it's that they are recessive meaning they will not make the tomato yellow.

Answer 2

The answer to your question is B.