Key Questions Write these in your notebook 1

Key Questions Write these in your notebook! 1. What is the role of chromosomes in cell division? 2. What happens during the phases of mitosis? 3. How do daughter cells split apart after mitosis?

Important Vocabulary Write these in your notebook! ● ● ● ● Chromosome Chromatin Cell Cycle Interphase Mitosis Cytokinesis Prophase Chromatid Centromere Centriole Metaphase Anaphase Telophase

A newborn baby was just a single cell 9 months ago. . . How do we get from a single cell, to a complex organism!?

Cell Replication and Division! How fast do you think your body can make cells? ● A healthy human adult produces 25 million new cells. . . EACH SECOND

Why do we have cell division? GRRRR ● ● ● For cell Growth To Repair worn out or damaged parts Regeneration Replacement Reproduction

What’s the lifespan of a cell. . . in the intestines? - 3 Days …on your skin? - 20 Days. . . in your stomach? - 2 Days. . . in your liver? - 200 Days. . . in your brain? - 30 -50 YEARS * ● These cells rarely divide - that’s why nerve damage is usually permanent

The Cell Cycle This is the life cycle of a cell.

What would happen if a cell were to simply split in two?

Each cell must contain ALL of the genetic code (DNA) Most of the time, DNA is in the form of chromatin = long, thin strands of DNA.

Let’s draw our own Chromosome!

The complete Cell Cycle occurs in 3 phases: 1. Interphase = Cell Growth & Preparation 2. Mitosis = Division of the Nucleus (DNA) 3. Cytokinesis = Division of the Cytoplasm

Mitosis This is the process of chromosomal division in the cell. It is divided into 4 distinct phases: 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase

Mitosis Prophase The genetic material inside the nucleus condenses and the chromosomes become visible.

Mitosis Metaphase The centromeres of the chromosomes line up across the center of the cell.

Mitosis Anaphase The chromosomes separate and move to opposite ends of the cell.

Mitosis Telophase The chromosomes begin to spread out into a tangle of chromatin.

Cytokinesis completes the process of cell division by dividing one cell into two

What do we have at the end of mitosis?

Two, identical daughter cells. These cells carry out the same exact duties as the parent cell. They are genetically identical.

Mitosis Flip-Animation Materials ● AT LEAST 12 squares of blank computer paper ● Colored Pencils or Pens Procedures 1. Use the Flip-Animation Storyboard to plan out each phase of Mitosis. Make sure to include all the components listed. 2. Using one square per stage, draw a picture showing the different stages of mitosis. Make sure each drawing is the SAME SIZE. 3. Lay out the cards in the correct sequence and place a blank card between them. Draw what must happen between those stages for one scene to look like the next. Each card’s scene should lead smoothly to the next. 4. Make a title card for your flipbook and make sure your name is on it.