a network of microtubules that forms during mitosis that moves chromosomes to the poles

the first phase of mitosis; chromosomes become visible, nuclear envelope disappears, spindle forms

the second phase of mitosis; chromosomes line-up at the equator

the third phase of mitosis; centromeres divide, chromatids move toward opposite poles

the fourth phase of mitosis; nuclear envelope forms at each pole, chromosomes uncoil, spindle dissolves, cytokinesis begins

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Holt chap 6 sect 3

Polar Bear Book Mitosis and Cytokinesis

Term	Definition
spindles	a network of microtubules that forms during mitosis that moves chromosomes to the poles
prophase	the first phase of mitosis; chromosomes become visible, nuclear envelope disappears, spindle forms
metaphase	the second phase of mitosis; chromosomes line-up at the equator
anaphase	the third phase of mitosis; centromeres divide, chromatids move toward opposite poles
telophase	the fourth phase of mitosis; nuclear envelope forms at each pole, chromosomes uncoil, spindle dissolves, cytokinesis begins