Rice Plants May Be Tolerant or Intolerant to Flooding

question 66

Multiple Choice

Rice plants may be tolerant or intolerant to flooding. A true-breeding tolerant plant was crossed with a true-breeding intolerant plant, and approximately 75% of the F₁ generation 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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