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If a purebred red flowered plant (RR) is crossed with a purebred white flowered

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Question: If a purebred red flowered plant (RR) is crossed with a purebred white flowered plant (rr), what will be the phenotype of the F1 generation?

Options:

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

Correct Answer: Red

Solution: 

The F1 generation will all be red (Rr) since red is dominant over white.

If a purebred red flowered plant (RR) is crossed with a purebred white flowered

Practice Questions

Q1
If a purebred red flowered plant (RR) is crossed with a purebred white flowered plant (rr), what will be the phenotype of the F1 generation?
  1. Red
  2. White
  3. Pink
  4. Mixed

Questions & Step-by-Step Solutions

If a purebred red flowered plant (RR) is crossed with a purebred white flowered plant (rr), what will be the phenotype of the F1 generation?
  • Step 1: Identify the genotypes of the parent plants. The red flowered plant is RR and the white flowered plant is rr.
  • Step 2: Understand that R (red) is dominant and r (white) is recessive.
  • Step 3: When the two plants are crossed, each parent contributes one allele to the offspring.
  • Step 4: The red flowered plant (RR) can only contribute R alleles.
  • Step 5: The white flowered plant (rr) can only contribute r alleles.
  • Step 6: Combine the alleles from both parents. The offspring will have the genotype Rr.
  • Step 7: Determine the phenotype based on the genotype. Since R (red) is dominant, the phenotype will be red.
  • Mendelian Genetics – Understanding dominant and recessive traits in inheritance patterns.
  • Genotype vs. Phenotype – Differentiating between the genetic makeup (genotype) and the observable characteristics (phenotype) of an organism.
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