5.2 Mitosis and Cytokinesis First Five 2/7 1.Pick up your DNA bag and sit with your partner. 2.How does the structure of DNA affect its function? (You must list 2 ideas) Schedule 1.First Five 2.Mitosis Textbook Exercise/ Oral Quizzes 3.Clean Up HW: All Replication QuizzesMake-up Due Fri. 02/11 GQ: How is DNA replicated?

5.2 Mitosis and Cytokinesis First Five 2/11 1.Why do cells need to reproduce or go through mitosis? GQ: How do cells divide? Schedule 1.First Five 2.Quiz and Mitosis Sheet 3.Mitosis Snap-beads

5.2 Mitosis and Cytokinesis First Five 2/11 1.Write down the four phases for mitosis. 2.Pick up a colored pencil bag. Schedule 1.First Five 2.Mitosis Notes 3.Snapbeads HW: Mitosis Lab and quiz – Due Friday Mitosis/Cell Cycle/DNA – Due Tues 2/17 Test pkt and Test – Wed. 2/18 GQ: How does cell division work?

5.2 Mitosis and Cytokinesis KEY CONCEPT Cells divide during mitosis and cytokinesis.

5.2 Mitosis and Cytokinesis

Why do cells need to divide? 1.Replace old and damaged cells 2.Big cells begin to starve and lack Oxygen 3.Big cells cannot get rid of waste or CO 2 fast enough

5.2 Mitosis and Cytokinesis Chromosomes condense at the start of mitosis. DNA wraps around proteins (histones) that condense it. DNA double helix DNA and histones Chromatin Supercoiled DNA

5.2 Mitosis and Cytokinesis DNA plus proteins is called chromatin. One half of a duplicated chromosome is a chromatid. Sister chromatids are held together at the centromere. Telomeres protect DNA and do not include genes. Condensed, duplicated chromosome chromatid telomere centromere telomere

5.2 Mitosis and Cytokinesis Parent cell centrioles spindle fibers centrosome nucleus with DNA Interphase prepares the cell to divide. During interphase, the DNA is duplicated. Mitosis and cytokinesis produce two genetically identical daughter cells.

5.2 Mitosis and Cytokinesis Mitosis divides the cell’s nucleus in four phases. –Prophase  chromosomes condense and spindle fibers form.

5.2 Mitosis and Cytokinesis Mitosis divides the cell’s nucleus in four phases. –Metaphase  chromosomes line up in the middle of the cell.

5.2 Mitosis and Cytokinesis Mitosis divides the cell’s nucleus in four phases. –Anaphase  sister chromatids separate to opposite sides of the cell.

5.2 Mitosis and Cytokinesis Mitosis divides the cell’s nucleus in four phases. –Telophase  the new nuclei form and chromosomes begin to uncoil.

5.2 Mitosis and Cytokinesis Cytokinesis differs in animal and plant cells. –In animal cells, the membrane pinches closed. –In plant cells, a cell plate forms.

5.2 Mitosis and Cytokinesis Mitosis Videos

5.2 Mitosis and Cytokinesis First Five 2/10 1.Why do cells need to divide? (Generate 2 reasons) 2.Check your grade. Schedule 1.First Five 2.Notes Mitosis 3.Mitosis Snapbeads HW: DNA Replication Quiz – Due Tomorrow Test/Test Packet – Due Thurs 2/13 Review – Due Wednesday 2/12 GQ: How does cell division work?

5.2 Mitosis and Cytokinesis First Five 2/12 1.What is the form DNA takes in Interphase? 2.Take out your Review 3.Pick up a snapbead bag and colored pencil bin. Schedule 1.First Five 2.Mitosis Snapbeads HW: Mitosis Lab and quiz – Due Thursday Review – Due Today Test/Test Packet – Due Tomorrow GQ: How does cell division work?

5.2 Mitosis and Cytokinesis Human Cells have 23 pairs of chromosomes (total 46) Homologous chromosomes –Two chromosomes that have copies of the same genes

5.2 Mitosis and Cytokinesis DO NOW 1.What is the differences between chromatin, chromatids and chromosomes 2.Get out your planner GQ: How do cells divide?