Rice Plants May Be Tolerant or Intolerant to Flooding

question 3

Multiple Choice

Rice plants may be tolerant or intolerant to flooding. A true-breeding tolerant plant was crossed with a true-breeding intolerant plant, creating an F₁generation. When plants from the F₁generation are crossed to each other, approximately 75% of the resultant F₂generation was tolerant to flooding. What does this most likely suggest about the flood-tolerant and flood-intolerant alleles?

• A) Multiple alleles control flood-tolerance.
• B) The alleles for flood-tolerance and flood-intolerance are codominant.
• C) The allele for flood-tolerance is incompletely dominant.
• D) The allele for flood-intolerance is dominant, while the allele for flood-tolerance is recessive.
• E) The allele for flood-tolerance is dominant, while the allele for flood-intolerance is recessive.

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