With an approximately 1000-fold magnification,
the metaphase chromosomes of man and
other vertebrates can readily be recognized
under the light microscope as individual rodlike
structures. A metaphase is shown here at about
2800-fold magnification. The chromosomes
differ from each other in length, in the size and
arrangement of their transverse light and dark
bands (banding pattern), and in the point of attachment
of the spindle (centromere), which is
recognizable as a constriction. In prometaphase,
the chromosomes are longer than in
metaphase and showmore bands. Thus, for certain
purposes chromosomes are also studied in
prometaphase.
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