mitosis/cellular division

Mitosis.Created by E. Green09/03/2014

Mitosis is also called Cell Division, why?During mitosis, the nucleus of

the cell divides, forming two nuclei with identical genetic information.

Why is Mitosis important?Allow an organism to grow.

Repairs damaged cells/tissue.

Replace dead cells/tissue.

Reproduction in some simple organisms.

Where does Mitosis take place? In all somatic cells (include all

body cells and excludes the sex cells – sperm/egg cells)

The process of Mitosis consists of a few phases:

INTERPHASEPROPHASEMETAPHASEANAPHASETELOPHASE

Interphase: Cell builds up enough energy for division

process. DNA replication occurs Cell look normal, like before division

Prophase:Nuclear envelope and nucleolus

disappear.

Chromatin become more tightly coiled, and condenses into individual chromosomes. Chromosomes arrange randomly in the cell.

continueCentrioli move to opposite poles,

with spindle fibers stretching between them.

Metaphase: The centrioli reached the opposite poles

with the spindle fibers in between. The chromosomes arrange randomly on

the equator, each single chromosome attaching to a separate spindle fiber by means of the centromere.

Anaphase: The spindle fibers pull tight. The centromeres attaching the

chromatids of the chromosomes split in half.

Daughter chromosomes move to opposite poles.

Telophase: Daughter chromosomes reach poles. Nuclear envelope surrounds

chromosomes. Nucleolus reappear at each pole. Chromosomes become less condense

forming chromatin. Two identical nuclei has been formed.

Continue… Invagination of the cytoplasm and

plasma membrane occurs. (Cleavage furrow forms in animal cells and a cytoplasmic plate forms in plant cells)

Continues until the cell in divided into 2 separate cells. (Identical to one another and to the original cell)

The Mitosis process:

Tips:Definition of mitosis.Know where it occurs.Know importance of mitosis.Name and discuss the different

phases.Draw and label each phase.

Something interesting!http://www.youtube.com/watch?v=DD3IQknCEdc

Sources: Images: http://obsickboy2.files.wordpress.com/2

010/10/mitosis.jpg http://www.lentigen.com/images/somati

c_overview_graphic.jpg http://www.lentigen.com/images/somati

c_overview_graphic.jpg http://img.tfd.com/dorland/thumbs/mito

sis.jpg http://media-cache-ec0.pinimg.com/73

6x/50/f2/a3/50f2a33d2e5648cfb58883d85b90173b.jpg

http://media-cache-ak0.pinimg.com/736x/e9/8a/59/e98a5923fb6cd584c37d4be42db0ca55.jpg

Continue… http

://www.slideshare.net/mnorthrup2718/mitosis-10163181?qid=f0c8e355-a3d4-4847-aad6-1ba169a63d8c&v=default&b=&from_search=2

http://www.slideshare.net/SSpencer53/mitosis-25337539?qid=f0c8e355-a3d4-4847-aad6-1ba169a63d8c&v=default&b=&from_search=7

http://www.slideshare.net/farrellw/mitosis-powerpoint-11216292

http://www.slideshare.net/kpytel/mitosis-notes-52-27298621

Williamson,J.,(2013). Class notes.