Cell Cycle

Front 1

Interphase

Back 1

Growth and preparation for cell division

Front 2

Mitosis

Back 2

1. The purpose of it is cell division : making two cells out of one.

2. The DNA is replicated in interphase [during the S phase].

3. At the end of DNA replication, the cell contains 2 identical sets of DNA.

4. The chromosomes have to break apart so that each new cell only has one set of chromosomes/

5. Its divided into 4 phases; Prophase, Metaphase,Anaphase &Telophase

Front 3

Prophase

Back 3

1. Chromatin condenses to become chromosomes.

2. Spindle fibers form a bridge between the end of the cell.

3. The nuclear membrane [envelope] disappears

Front 4

Metaphase

Back 4

1. Chromosomes line up across the center of the cell.

2. Each chromosome attaches to a spindle fiber at its centromere

Front 5

Anaphase

Back 5

1. Centromeres that join the sister chromatids spilt.

2. Sister chromatins separate becoming individual chromosomes.

3. Separated chromatids move to opposite sides of the cell.

Front 6

Telophase

Back 6

1. Chromosomes [each consisting of a single chromatid] begin to lose their rod like appearance. They are becoming chromatin again.

2. A new nuclear envelope forms [nucleus] around the chromosomes at each side of the cell.

3. Spindle fibers break down.

4. Cytokinesis begins .

Front 7

Cytokinesis

Back 7

1. The division of the cytoplasm into two individual cells.

2. Process differs somewhat in plant & animal cells

3. In animal cells the cell membrane pinches the cell into two nearly daughter cells.