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An Atlas of Mammalian Chromosomes - Volume 1 (Paperback, Softcover reprint of the original 1st ed. 1967)
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An Atlas of Mammalian Chromosomes - Volume 1 (Paperback, Softcover reprint of the original 1st ed. 1967)
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In recent years, because of advances in karyological techniques, we
have witnessed a remarkable renewal of interest in studies of
mammalian chromosomes. These techniques, generally involving the
use of tissue culture, colchicine and hypotonic solution
pretreatments, allow for a much clearer display of metaphase
chromosomes of mammalian cells than the classic direct squash or
tissue section methods. Consequently, what was known about the
chromosome complement of most mammals must be revised. The most
astonishing revision, of course, was that made by Tjio and Levan in
1956, who demonstrated that the diploid number of man is 46, not 48
as previously believed. Similar revisions will have to be made for
many other mammalian species, either in number or in karyotype
structure. Many animals are being examined cytologically for the
first time. The findings are now extensive and scattered; they
appear in numer ous periodicals and newsletters, or they are kept
in cytologists' file drawers without being published. It is
difficult to have access to perti nent data for comparison among
related species or for evaluation of various karyological
characteristics within a karyotype. Such evaluations can be done
only when reasonably uniform material is collected and placed side
by side for comparison, accompanied by relative references. We
considered that probably an Atlas of Mammalian Chromosomes would
fulfill such a need. Needless to say, it is impossible to present
karyotypes of all mam malian species at one time.
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