Warm Up 02/11 If the sentence is true, write true. If the sentence is false, replace the underlined term to make the sentence true. ____ Cell division enables multicellular organisms to develop. ____________ _____ A cell must have half a set of genetic material to function. ____________ _____ Cells come from other cells through transportation. ____________

3.2 Cell division is part of the cell cycle LEQ: How is cell division part of the cell cycle?

What is a cycle? A cycle is an activity or set of events that regularly repeats. Cycles can be shorts, like the sequence that make your heart beat, or they can be very long, like the turning of our galaxy. An example of a cycle is ______________.

The cell Cycle Includes interphase and cell division The cell cycle is the normal sequence of development and division of a cell. It consists of two main phases: one where the cell carries out its functions, called interphase, and one in which the cell divides, which can include mitosis and cytokinesis.

Cell Cycle All cells divide but only eukaryotes undergo mitosis. Each cell phase in the cell cycle requires a certain period of time (from a few hours to days or years)

Interphase Is the part of the cell cycle during which the cell is not dividing. Cell grows to about twice the size it was when it was first produced. The cell also engages in normal activities, also cellular respiration occurs, which provides the cell energy. All changes that occur during interphase prepare the cell for cell division, DNA duplicates here.

Cell Division Phase Mitosis is the part of the cell cycle during which the nucleus divides. Prokaryotes do not undergo mitosis because they have no nucleus. In most cells, Mitosis is the shortest period in the life cycle. The Function of mitosis is to move the DNA and other material in the parent cell into a position for cell division.

Cytokinesis When the cell divides, each new cell gets a full set of DNA and other structures. Cytokinesis is the division of the parent cell’s cytoplasm. Cytokinesis occurs immediately after mitosis.

Cytokinesis As a result of mitosis and cytokinesis, the original or parent cell splits into two genetically identical daughter cells. In this case, daughter cells does not apply to gender, it refers scientifically to the term used to refer to the two new cells. Each daughter cell receives a set of DNA from the parent or original cell.

Steps of Mitosis- Prophase 1 st step- Chromosomes form- Prophase, the DNA in the nucleus condenses and becomes visible under a light microscope. Each chromosome consists of two identical chromatids held together by a centromere. The membrane around the nucleus disappears.

Steps of Mitosis - Metaphase 2 nd step – chromosomes line up- Metaphase, the chromosomes line up in the middle of the cell.

Steps of Mitosis- Anaphase 3 rd step- Chromosomes separate- Anaphase, the chromatids split, resulting into two separate identical chromosomes. These chromosomes are pulled to opposite sides of the cell.

Steps of Mitosis- Telophase 4 th step- Nucleus forms- Telophase, A new nuclear membrane forms around each group of chromosomes. The chromosomes return to their threadlike form.

Division of the Cytoplasm Cytokinesis is the division of the parent cell’s cytoplasm, immediately follows mitosis in eukaryotic cells. Cytokinesis differs slightly in animal cells and plant cells. In animal cells, the fiber ring forms in the center of the cell.

Cytokinesis in Animal Cells In animal cells, the fiber ring forms in the center of the dividing cell. The ring fiber contracts, pulling the cell membrane inward. Eventually, the cell is pinched into two new daughter cells.

Cytokinesis in Plant Cells In plant cells, cell wall prevents the cell membrane from being pulled inward. A structure called a cell plate grows between the two nucleus. The cell plate develops into a membrane and eventually becomes part of the cell wall of each of the new cells.

Review Copy and answer in your notebook the review questions on page 85 unit C. Homework – complete the sheet THE LAST WORD using the word MITOSIS. Complete the acronym with sentences that summarize what you have learned about the cell cycle and mitosis using the first letter.