Question #6423987Single Choice

Biology

Question

A female carries an X-linked recessive allele for color blindness, but she does not express the condition. Her son inherits the allele and expresses color blindness. What does this illustrate?

Options

The son inherited the X-linked allele from his father.

The mother carries the allele but does not express the trait due to X-inactivation.

The mother passed the X-linked allele to her son, who expressed the trait.

The condition is autosomal, not X-linked.

Answer & Analysis

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