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 R RR and. 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 :
To determine the ratio of red-to-white flowering plants in the F2 generation from the given Punnett square, let's follow these steps:
1. Understand the Genotypes and Phenotypes:
- According to the information given, the red flower trait is governed by the dominant allele R. Therefore, plants with genotypes RR and Rr will have red flowers.
- The white flower trait is governed by the recessive allele r, meaning only plants with genotype rr will have white flowers.
2. Examine the Punnett Square:
- The Punnett square provided is used to find the potential genotypic combinations when crossing two F1 generation geraniums.
- The square shows the following combinations: RR, Rr, RR, Rr.
3. Identify the Phenotypes:
- From the Punnett square, we have four outcomes: RR, Rr, RR, and Rr.
- All these genotypes (RR and Rr) result in red flowers because they all contain at least one dominant R allele.
4. Ratio of Red to White Flowers:
- In this situation, since all of the combinations (RR and Rr) lead to red flowers, and there are no combinations resulting in white flowers (no rr), we will not have any white flowering plants.
5. Conclusion:
- The ratio of red to white flowering plants is "all red" since every possible genotype from this cross results in plants with red flowers, and there are no white flowering plants.
This analysis shows that the expected phenotypic outcome in the F2 generation will be entirely red flowering plants.
1. Understand the Genotypes and Phenotypes:
- According to the information given, the red flower trait is governed by the dominant allele R. Therefore, plants with genotypes RR and Rr will have red flowers.
- The white flower trait is governed by the recessive allele r, meaning only plants with genotype rr will have white flowers.
2. Examine the Punnett Square:
- The Punnett square provided is used to find the potential genotypic combinations when crossing two F1 generation geraniums.
- The square shows the following combinations: RR, Rr, RR, Rr.
3. Identify the Phenotypes:
- From the Punnett square, we have four outcomes: RR, Rr, RR, and Rr.
- All these genotypes (RR and Rr) result in red flowers because they all contain at least one dominant R allele.
4. Ratio of Red to White Flowers:
- In this situation, since all of the combinations (RR and Rr) lead to red flowers, and there are no combinations resulting in white flowers (no rr), we will not have any white flowering plants.
5. Conclusion:
- The ratio of red to white flowering plants is "all red" since every possible genotype from this cross results in plants with red flowers, and there are no white flowering plants.
This analysis shows that the expected phenotypic outcome in the F2 generation will be entirely red flowering plants.
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