Mitosis
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Mitosis. 1.Prophase. Chromosomes coil to short fat rods. Nuclear envelope breaks up. Spindle fibers assemble across cell. Animal Cell Prophase. Plant Cell Prophase. a. Early Prophase. 1. Chromatin coils to chromosomes. 2. Nucleolus & nuclear membrane break down & disappear.

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Mitosis

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Mitosis

Mitosis


1 prophase

1.Prophase

Chromosomescoil to short fat rods

Nuclear envelope breaks up

Spindle fibers assemble across cell

Animal Cell Prophase

Plant Cell Prophase


A early prophase

a. Early Prophase

1. Chromatin coils to chromosomes

2. Nucleolus & nuclear membrane break down & disappear

3. Centrioles move to poles (animal cells only).


B middle prophase

b. Middle Prophase

Spindle fibers (microtubules)

appear

  • 2 Kinds:

    • Polar – centriole to centriole

    • Kinetochore – centromere to centriole

Control Movement


C late prophase

c. Late Prophase

  • Aster appear (fibers that radiate from each centriole)


2 metaphase

2.Metaphase

  • Kinetochore fibers move chromosomes to equator cell; line up.


3 anaphase

3.Anaphase

  • Centromere splits

  • Sister chromatids pulled to opposite ends


4 telophase

4.Telophase

Identical chromatids at opposite end (each side has complete set of chromosomes)

Centrioles & spindle disappear

Chromatids unwind & elongate to chromatin

Nucleolus & nuclear membrane reappear


Mitosis

1.Prophase

2.Metaphase

3.Anaphase

4.Telophase


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