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All the evidence indicates that these chromosomes carry the "factors" in inheritance which produces the characters or characteristics of the individual body. In mitosis or ordinary cell division, these chromosomes split lengthwise, so that the new cells always have the same number as the original one.
A couple of years ago it was discovered by Murray and Bashford, of the English Imperial Cancer Research Commission, that the cells of cancer, in their swift and irregular reproduction, showed an unexpected peculiarity. In the simplest form of reproduction, one cell cutting itself in two to make two new ones, known as mitosis, the change begins in the nucleus, or kernel.
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