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Best Answer: unduplicated chromosomes are single linear strands, whereas duplicated chromosomes (copied during synthesis phase) contain two copies joined by a centromere.(centromere is a region of DNA t found near the middle of a chromosome where two identical sister chromatids come in contact).
HAPLOID vs. DIPLOID. A chromosome is described as a double-helix structure that confines DNA and protein in cells. It is a strand of DNA which contains genes found in living organisms and also the hereditary material that defines the development and characteristics of each organism. .