All living things are made of cells. Cells are the basic unit of life. Cells come from other cells.

Schwann – animal cells 1839Schleiden – plant cells 1839Virchow – cell come from pre-existing cells

1855

This process of division is called

Mitosis. It occurs in multiple stages or phases. You will learn the details of this process in high school biology.

However, today, we are observing cells that are going through different stages of the reproductive process called Mitosis.

INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

Normal Cell Activities – DNA in chromosomes is copied at end of stage

Chromosomes line up in middle of cell (in pairs – sister chromatids)

Nuclear membrane forms around both ends of chromatids.

Cell membrane separates into two new cells.

Chromosomes thicken and becomevisible. (getting ready to divide)

Chromatids pull apart – half go to each side

http://www.biologycorner.com/projects/mitosis/whitefish_embryo.html

http://www.biologycorner.com/projects/mitosis/onion_root.html

Whitefish Mitosis

Onion Root Tip Mitosis

Where would you say cells come from?How do cells reproduce?

Where would you say cells come from? Cells come from other cells.

How do cells reproduce?

Where would you say cells come from? Cells come from other cells.

How do cells reproduce?

Cells divide through MITOSIS.