Which of the following best describes a recessive allele?

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Question: Which of the following best describes a recessive allele?

Options:

Correct Answer: It can only be expressed in a homozygous condition

Solution:

A recessive allele is only expressed in the phenotype when an individual has two copies of that allele (homozygous condition).

Which of the following best describes a recessive allele?

Which of the following best describes a recessive allele?

Correct Answer: A recessive allele is expressed only when two copies are present.

Step 1: Understand what an allele is. An allele is a version of a gene that can determine a specific trait.
Step 2: Learn about dominant and recessive alleles. A dominant allele can mask the effect of a recessive allele.
Step 3: Know that a recessive allele is not expressed if a dominant allele is present. It only shows up when there are two recessive alleles.
Step 4: Realize that having two copies of the recessive allele is called being homozygous for that allele.
Step 5: Conclude that a recessive allele is expressed in the phenotype (the observable traits) only when an individual has two copies of it.

No concepts available.