The Cell Cycle: M Phase, Mitosis, and Cytokinesis

The Cell Cycle: M Phase, Mitosis, and Cytokinesis
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The M phase of the cell cycle consists of two stages, mitosis and cytokinesis. During mitosis, the genetic material in the nucleus condenses

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PowerPoint presentation about 'The Cell Cycle: M Phase, Mitosis, and Cytokinesis'. This presentation describes the topic on The M phase of the cell cycle consists of two stages, mitosis and cytokinesis. During mitosis, the genetic material in the nucleus condenses. The key topics included in this slideshow are . Download this presentation absolutely free.

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Slide1Cell Cycle: M PhaseMitosis and Cytokinesis

Slide2Ce l l  D i v i s i o n  ( M  p h a s e ) • Occurs in two stages – Mitosis (nuclear division) – Cytokinesis (cytoplasmic division)

Slide3Pr o p h a s e  ( P i e c e s ) • Genetic material condenses/coils and duplicated   chromosomes ( sister chromatids )  becomes visible • Spindle (from centrioles) begins to form • Nucleolus disappears • Nuclear envelope breaks down • Centrioles move to opposite ends of the cell – *Plant cells do not have centrioles

Slide4Me t a p h a s e  ( M i d d l e ) • Centromeres of duplicated CHX line up across the center of the cell • Spindle fibers connect to each centromere

Slide5An a p h a s e  ( A p a r t ) • Sisters chromatids separate and begin to move apart –  now individual CHX • Individual CHX move along spindle fibers to the opposite ends of the cell • Anaphase is over when CHX are completely separated into two groups

Slide6Te l o p h a s e  ( T w o ) • Condensed CHX begin to spread out and de-condense back into chromatin • Nuclear envelopes re-form around each cluster of CHX • Spindle begins to break apart • Nucleolus becomes visible in each daughter cell

Slide7Mi t o s i s  i s C o m p l e t e But the M phase is not…

Slide8Cy t o k i n e s i s • After mitosis is complete, all that remains of the M phase of the cell cycle is the process of cytokinesis. • Cytokinesis is the division of the cytoplasm itself/splits one cell into two • Occurs concurrently with telophase • Cell division is complete

Slide9The rigid cell wall will not allow thecell to pinch like an animal cell. How are plant cells different from animal cells? And how will this difference affect cytokineses? PINCHING

Slide10How are plant cells different from animal cells?•   Plant cells form cell plates  to divide the cell . • The cell plates develop into cell membranes, separating  the two  daughter cells • A cell wall forms in between the two new membranes

Slide11 Difference between plant and animal cell cytokinesis: • Animal cells pinch, forming cleavage furrow while… • Plant cells form cell plates to divide the cell CELL PLATE

Slide12Ad d i t i o n a l  N o t e c a r d s • Cytokinesis • Interphase – G1 – S – G2