Two copies of the same gene on a single chromosome would indicate a(n)________ had occurred.

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Two copies of the same gene on a single chromosome indicate that a duplication has occurred. A duplication is when a segment of a chromosome is duplicated, resulting in two copies of that segment on the same chromosome. A deletion is when a segment of a chromosome is lost, resulting in a missing piece. An inversion is when a segment of a chromosome is reversed in orientation. A translocation is when a segment of a chromosome breaks off and attaches to a different chromosome. None of these events would result in two copies of the same gene on a single chromosome.

Two Copies of the Same Gene on a Single Chromosome