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The complete history of the Universe -- from the Big Bang to 200 my into the future

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Chromosomes

When a cell divided it had to pass on a copy of all of its genes to both of its daughters. This was very difficult to do when the genes were all separate. So cells evolved which had all their genes joined together end to end. This long chain of genes is called a chromosome ("kro-mo-sowm"). As the cell divided it copied the chromosome and passed a copy on to each daughter. So they both got a complete copy of all the mother cellís genes.

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

eBook only $2.99
398 pages, 300 images

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