Unit 3 Lecture 2 - Pre-Lesson Cell Division Mitosis

Repair cells

Replace cells

Reproduce cells

Grow cells

this is the regular sequence of events in which the cell grows, prepares for division, and divides to form two daughter cells .

After this cycle is complete, each daughter cells begin the cycle again

The cycle has 3 stages

and has steps for each stage that need to take place before the next stage starts.

during this stage the cell grows, makes a copy of its DNA and prepares to divide into two cells.

the three steps for this phase are

1. grow: cell grows to it full size and produces organelles for split

2. Replication: makes a copy of its DNA to pass on at the split.

3. Preparing for division: once DNA replicated produces what it needs to split in two

once interphase ends the next stage is Mitosis: the cell's nucleus divides into two new nuclei and one set of DNA is distributed into each daughter cell.

There are 4 steps that need to take place in this stage.

1. Prophase: DNA condenses into seperate chromosomes.

2. Metaphase: chromosomes line up along the center of the cell. Chromatids line up for each cell.

3. Anaphase: fibers connect to the centioles pull the chromatids apart into each side of the cell.

4. Telophase: chromatids are pulled to opposite ends of the cell, the nuclear membrane reforms around the DNA to create two new Nuclei.

the final stage of cell cycle is Cytokinesis: this stage completes the process. The cell's cytoplasm divides distributing the organelles into each of the two daughter cells.

The only step of this stage is to separate the two daughter cells from each other to create two separate daughter cells.