Question

In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction of the offspring should have red flowers?

Answer 1

The correct answer is 3/4.

Step-by-step explanation:

In a genetic cross if both the parents are heterozygous for the color trait then the genotype would be Rr for male parent and the same genotype would be of the female parent.

So when these two genotypes segregate and combine with each other then the F1 generation would have the genotype RR, Rr, Rr, and rr. So three of the four offspring would have dominant red allele and one would not have the dominant allele.

As a result three of the four progeny would have red color flower and one would have white color. So the fraction of red flower would be 3/4.

Answer 2

To answer this specific problem, 3/4 of the offspring should have red flowers. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.