MITOSIS

Chromosomes

Are made of DNA Each chromosome consists of sister

chromatids attached at a centromere

Mitosis

Mitosis is a process of cell division

Goal = production of 2 daughter cells.

The daughter cells are identical to one another and to the original parent cell.

Mitosis

Cells divide for growth or repair.

Before each division, the cell makes an identical copy of each chromosome

During mitosis, each of the two new cells receives a complete set of 46 chromosomes.

Identical meaning it has the same info.

Stages

The easiest way to remember Mitoses is PMAT. Interphase Prophase Metaphase Anaphase Telophase

Prophase(Preparing)

Longest phase of mitosis

Nuclear envelope & nucleolus disappears.

Chromosomes become visible.

Prophase(Preparing)

Centrioles (animal cell) form and move to opposite poles of cell

Spindle fibers form from centrioles, cross cell and attach to the chromosomes.

Metaphase(middle)

Chromosomes line up in the middle of the cell.

Spindles are attached to them.

Anaphase(Apart)

Spindle fibers begin to shorten.

This pulls chromosomes apart.

Chromosome halves are now referred to as chromatids.

Telophase(Two cells)

Chromatids reach poles.

Chromosomes become chromatin.

Spindle fibers break down.

Nucleolus and nuclear envelope appear.

Cytokinesis (happens during telophase)

Division of cytoplasm

In animal cells: cell membrane continues to pinch in until two cells are formed

Cytokinesis (happens during telophase)

In plant cells: cell plate forms in center of cell and eventually splits cells

At the end of mitosis, two new “daughter” cells are produced.

Mitosis in general

Done by:

Elani Landman

References

http://www.slideshare.net/dreyngerous/mitosis-539875 (Accessed on 7 March)

Nickason. R http://www.slideshare.net/RachelNickason/mitoses?qid=97b8472a-00ed-4546-badc-f745189cc320&v=default&b=&from_search=1 (Accessed on 7 March)

http://www.slideshare.net/wja10255/mitosis-notes-cell-cycle-for-blog-11709106 (Accessed on 7 March)