The correct response is: Chromosomes contain one or more genes.
Here's a brief explanation of the relationship:
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Chromosomes are long strands of DNA wrapped around proteins, and they are located in the nucleus of cells. Each chromosome contains many genes, which are segments of DNA that code for proteins or have regulatory functions.
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Genes are specific sequences of DNA that carry the instructions for building proteins, which perform various functions in the body.
So, in summary, chromosomes house genes, and genes are the functional units of heredity found within chromosomes.