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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Definitions:

Coupling

In biology, the process of linking two molecules together, often used in reference to chemical reactions or genetic recombination.

Chemical Reactions

Processes where substances interact to form one or more new substances with different chemical properties.

Second Law

This term is incomplete without a context but could refer to the Second Law of Thermodynamics, which states that the total entropy of an isolated system can never decrease over time.

Thermodynamics

The branch of physics that deals with the relationships and conversions between heat and other forms of energy.