We appreciate your visit to A horticulturalist wants to produce geraniums with specific characteristics She knows that the trait of red flowers is governed by the allele tex R tex. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
The red geranium is heterozygous for red flowers (Rr). Thus, the correct option is A.
What is true-breeding plant?
A plant whose genotype is in the homozygous condition and which can express the certain type of phenotype is called as a true breeding plant.
The red geranium is heterozygous plant for red flowers (Rr). We know that the red flower in the plant, to be red needs to have at least a single dominant allele, so it could be either Rr (heterozygous) or RR (homozygous).
If the white flower geranium (rr) is being crossed with RR (homozygous red geranium), all the offspring would be red with heterozygous genotype Rr.
On the other hand, if the flower is Rr (heterozygous) and it is being crossed with rr (homozygous), that would result in half of the new generation plants with having red flowers and the other half of the plants with white flowers.
In this case, the red geranium is heterozygous for red flowers (Rr).
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
A horticulturalist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r (rr).
The horticulturalist has a red geranium with an uncertain genetic makeup. She crosses it with a white geranium (rr) and gets a generation in which half of the plants have red flowers and half have white flowers. What does this combination of offspring tell her about the genetic makeup of the red geranium parent?
a. The red geranium is heterozygous for red flowers (Rr).
b. The red geranium is homozygous for red flowers (RR).
c. The trait shows incomplete dominance.
d. The red geranium is homozygous for white flowers (rr).
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