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Answer :
To determine the genetic makeup of the red geranium parent, we can analyze the offspring from the cross with a white geranium.
1. Traits Description:
- Red flowers appear if the plant has either two dominant alleles (RR) or one dominant and one recessive allele (Rr).
- White flowers appear only if the plant has two recessive alleles (rr).
2. Cross Analysis:
- The white geranium used for the cross is homozygous recessive (rr).
3. Offspring Results:
- The offspring consists of half red-flowered plants and half white-flowered plants.
4. Genetic Interpretation:
- For the offspring to have both red and white flowers, the red parent must have contributed one dominant R allele to some offspring (resulting in red flowers) and one recessive r allele to the others (resulting in white flowers).
- This indicates that the red geranium parent must be heterozygous (Rr). Only with this genotype (Rr), when crossed with a white geranium (rr), can you get:
- 50% offspring with Rr genotype (red flowers)
- 50% offspring with rr genotype (white flowers)
Thus, the genetic makeup of the red geranium parent is heterozygous for red flowers, Rr.
1. Traits Description:
- Red flowers appear if the plant has either two dominant alleles (RR) or one dominant and one recessive allele (Rr).
- White flowers appear only if the plant has two recessive alleles (rr).
2. Cross Analysis:
- The white geranium used for the cross is homozygous recessive (rr).
3. Offspring Results:
- The offspring consists of half red-flowered plants and half white-flowered plants.
4. Genetic Interpretation:
- For the offspring to have both red and white flowers, the red parent must have contributed one dominant R allele to some offspring (resulting in red flowers) and one recessive r allele to the others (resulting in white flowers).
- This indicates that the red geranium parent must be heterozygous (Rr). Only with this genotype (Rr), when crossed with a white geranium (rr), can you get:
- 50% offspring with Rr genotype (red flowers)
- 50% offspring with rr genotype (white flowers)
Thus, the genetic makeup of the red geranium parent is heterozygous for red flowers, Rr.
Thanks for taking the time to read She knows that the trait of red flowers is governed by the allele tex R tex tex RR tex and tex Rr tex and the. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!
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