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Chromosomes are made from DNA. Genes are short sections of DNA. Genetically identical cells are produced by a type of cell division called mitosis. In sexual reproduction, a male gamete fuses with a female gamete to produce a new cell.he cellâs nucleus contains chromosomes chromosomes: Rod shaped bodies found in the nucleus of cells that contain genetic information (DNA). made from long DNA molecules. The diagram shows the relationship between the cell, its nucleus, chromosomes in the nucleus, and genes. Nucleus, chromosome and gene. Page: 1  1. 2  2. 3  3.
â¢ In a single cell, the number of both DNA and chromosomes are similar, but only chromosomes contain histone proteins. â¢ The DNA which is much longer (4.8 cm) than chromosomes (6 Âµm) has a less coiled structure than chromosomes.