A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions.
Diagram of a replicated and condensed metaphase eukaryotic chromosome.
(1) Chromatid – one of the two identical parts of the chromosome after S phase. (2) Centromere – the point where the two chromatids touch, and where the microtubules attach. (3) Short arm. (4) Long foot
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http://ko.wikipedia.org/wiki/Chromosome
http://ko.wikipedia.org/wiki/Chromosome
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http://library.thinkquest.org/28751/review/division/1.html
Structure of a Chromosome
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http://harmonybodyphysics.com/PullingOnesSelfTogether.aspx
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http://www.accessexcellence.org/AB/GG/chromosome.php