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Mitosis and Meiosis Assignment

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Zetuix IX

on 17 November 2016

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Transcript of Mitosis and Meiosis Assignment

Mitosis and Meiosis Assignment by Josh T.
What is Cell Division?
Cell Division is when cells grow from other cells.
Late Prophase
- The chromosomes are very compact.
- The Chromosomes are now released because the Nuclear Envelope broke down.
- Mitotic Spindle grows more.
Why is Cell Division important?

Why Cell Division is important
For Healing: Cell Division allows our skin to heal and remain intact.
Stage 1 - Prophase
Early Prophase
- some structures of the cell are starting to break down to make other structures.
- Chromosomes are now condensing and the Mitotic Spindle begins to build.
- Nucleolus is starting to dissolve.
The cell division starts off with one cell and
divides into 2,4,8,16,32 until it reach 100
trillion cells that builds our body.
For Growth: Cell Division is important because if we didn't have Cell Division we wouldn't grow.

For Reproduction: Cell Division is necessary for the reproduction of both unicellular and multicellular organisms.
Interphase is when the cell is ready for growth and cell division.
2 things happen:
The Cell grows bigger
Duplicate of the cells chromosomes and organelles are being produced.

The Chromosomes are aligned on the Metaphase Plate.
The sister Chromatids are divided into two. Each one of the Chromatids goes to the Poles.
The cell is almost done dividing.
Two brand new nuclei forms and the nuclear membranes appears again.
the division of the cytoplasm to form two new cells.

Meiosis l
Prophase l
Homologous Chromosomes pair up and crossing over occurs.
Metaphase l
Homologous chromosomes line up at metaphase plate.
Anaphase l
homologous pairs divide and each goes to opposite ends.
Telophase l
Two cells are formed as Haploid cells.
Each chromosomes contain two different sister chromatids
Meiosis ll
Prophase ll
Chromosomes condense and the Nuclear Envelope is staring to break down.
Centrosomes separate and spindle forms in between them.
Metaphase ll
Chromosomes line up at the Metaphase plate.
Anaphase II
Sister chromatids separate and each one goes to one pole.
Telophase ll
Nuclear membrane surround each chromosome.
Chromosome start to condense again.
Split the chromosomes into four new haploid cells.
Mr Zimberg's Notes
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