Cell Biology: Mitosis

Prophase

chromatin condenses into chromosomes, nuclear membrane dissolves, centrosomes and microtubules migrate towards poles of the cell

Metaphase

microtubule spindle fibres attach to centromere of each pair of sister chromatids

Middle: Microtubule spindle fibres contraction cause sister chromatids to line up along center

Anaphase

Continued microtubule contraction separates sister chromatids (now chromosomes) and moves them to opposite poles

Telophase

microtubule spindle fibres and centrosomes separate, chromosomes arrive at poles, 2 new nuclear membranes form around each set of chromosomes, chromosomes decondense into chromatin

Cytokinesis

Contractile ring pulls cell membrane inwards, causing cleavage furrow which is pinched to form two identical daughter cells