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In a cross between a red flowered plant (RR) and a white flowered plant (rr), wh

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Question: In a cross between a red flowered plant (RR) and a white flowered plant (rr), what will be the color of the flowers in the F1 generation? (2019)

Options:

  1. Red
  2. White
  3. Pink
  4. Purple

Correct Answer: Red

Exam Year: 2019

Solution: 

The F1 generation will have red flowers since red is dominant over white.

In a cross between a red flowered plant (RR) and a white flowered plant (rr), wh

Practice Questions

Q1
In a cross between a red flowered plant (RR) and a white flowered plant (rr), what will be the color of the flowers in the F1 generation? (2019)
  1. Red
  2. White
  3. Pink
  4. Purple

Questions & Step-by-Step Solutions

In a cross between a red flowered plant (RR) and a white flowered plant (rr), what will be the color of the flowers in the F1 generation? (2019)
  • Step 1: Identify the genotypes of the parent plants. The red flowered plant has the genotype RR, and the white flowered plant has the genotype rr.
  • Step 2: Understand that 'R' represents the allele for red flowers and 'r' represents the allele for white flowers.
  • Step 3: Recognize that red (R) is dominant over white (r). This means that if a plant has at least one 'R' allele, it will have red flowers.
  • Step 4: Combine the alleles from both parent plants to determine the genotype of the F1 generation. The red flowered plant (RR) can only contribute 'R' alleles, and the white flowered plant (rr) can only contribute 'r' alleles.
  • Step 5: The F1 generation will have the genotype Rr, which means it has one 'R' allele and one 'r' allele.
  • Step 6: Since red is dominant, the flowers in the F1 generation will be red.
  • Mendelian Genetics – Understanding dominant and recessive traits in inheritance patterns.
  • Genotype and Phenotype – Differentiating between the genetic makeup (genotype) and the observable characteristics (phenotype) of an organism.
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