When chromosomal mutations occur, the chromosome can be affected. What is the result to the organism? Check all that apply.

A chromosomal mutation changes chromosome structure or number, but it does not always change an observable trait. If the affected genes do not alter the organism’s phenotype, there may be no change to its characteristics; in other cases, the mutation causes phenotypic changes. Choice C is not correct because a chromosomal mutation means the chromosome is affected.

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