After replication, chromosomes are made up of two DNA molecules (assume one chromatid is equal to one molecule of dna).
What is Chromosome?
A chromosome is a long DNA molecule that contains some or all of the genetic material of an organism. Most eukaryotic chromosomes contain histones, which adhere to and condense the DNA molecule to maintain its integrity. These chromosomes have a complicated three-dimensional structure that is important in transcriptional control. Chromosomes are only visible under a light microscope during the metaphase of cell division (where all chromosomes are aligned in the centre of the cell in their condensed form).
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