The correct statement is: Chromosomes contain DNA.
This statement accurately describes the relationship between chromosomes and DNA, where chromosomes are structures composed of DNA and proteins that carry genetic information.
The other statements are not true:
- "DNA contains chromosomes" is incorrect; rather, chromosomes are made up of DNA.
- "Chromosomes are found in sets of three" is inaccurate; chromosomes are typically found in pairs (diploid) or single sets (haploid).
- "The same number of chromosomes appears in haploid and body cells" is incorrect; haploid cells have half the number of chromosomes compared to diploid (body) cells.