The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part...

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Mitosis

Transcript of The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part...

Page 1: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Mitosis

Page 2: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

The cell cycle

Mitosis is only one section of the life cycle of a cell.

Interphase is the main part of the cell cycle. This is where DNA is replicated (a copy is made) to prepare for mitosis.

Page 3: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Overviewof mitosis

Page 4: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Interphase

Most of the cell cycle is spent in interphase.

During interphase the cell is growing and metabolic activity is very high. DNA is in the form of chromatin.

Toward the end of interphase, new DNA is synthesized and the chromosomes are replicated.

Page 5: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Prophase

•Chromosomes become condensed.•Nuclear membrane disintegrates.•Centrioles begin moving to the poles of the cell.

Page 6: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Metaphase

• Spindle fibres grow from centrioles to each chromosome and attach at the centromere. (Attachment point for the replicated sister chromatids.)• Spindle fibres line up all the chromosomes to the equator of the cell.

Page 7: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Anaphase

Spindle fibres pull on the sister chromatids, separating them.

Page 8: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Telophase

• The chromatids have been separated to opposite ends of the cell and a nucleus forms around each group. • Cytokinesis begins.

Page 9: The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.

Identifying the stagesprophase

interphase

anaphase

metaphase

telophase


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