The Cell Cycle 12/8/15 Use handout: graphic organizer for interpreting visuals Use the graphic organizer to answer questions about this visual (boxes 1-4 only) Date: 12/8/15 Topic: Cell Cycle and Mitosis Page # ___

Today in Room 326/311… HW: Mitosis Practice Worksheet Date: 12/8/15 Topic: Cell Cycle and Mitosis Page # ___ Today in Room 326/311… HW: Mitosis Practice Worksheet CONTENT OBJ: SWBAT identify and describe the phases of mitosis LANG. OBJ: SW discuss in pairs, listen to verbal information, write descriptions ANNOUNCEMENTS: Quiz tomorrow on reproduction!! AGENDA: Admit Slip Advantages of Sexual vs Asexual repro Review answers to quiz packet (1st and 3rd block only) Cell Cycle Mitosis notes (4th block only)

Advantages of Sexual Reproduction Homework Share Out Advantages of Sexual Reproduction Brief discussion

Review Packet Take 10 minutes and review answers with your partners. If you have not finished, pick up where you left off and then go back to the beginning. You have 10 minutes

The Cell Cycle What did you notice? Answers for A-D Use graphic organizer for interpreting visuals

The Cell Cycle Now answer E & F using the handout Page one of The Cell Cycle handout

Pre-assign numbers 1-5 to each table… Students discuss in pairs. Think: Cell Processes 1) Why do cells divide? 2) Which cells in the body divide more frequently? 3) Which cells in the body divide less frequently? 4) What stage are they in if they are not dividing? 5) Which cell division process creates IDENTICAL cell copies? 6) Which cell division process creates UNIQUE cell copies? So organisms can grow and repair! Skin cells Brain/nerve cells G0 Mitosis Meiosis

Cell Cycle & Cancer Cancerous lung cells Cancer occurs when cells do not receive proper signaling “Messed up” cells are normally stopped at the checkpoints “Messed up” cells are told to die- known as apoptosis (programmed cell death)** Cancer occurs when cells fail to go through apoptosis, and continue dividing anyway

Stages of Mitosis Get ready to write! Get ready to write!

First… chromosome vocab! Copy into journal!!!

Mitosis Video IPMATC “I pee, Matt see!” https://www.youtube.com/w atch?v=ofjyw7ARP1c Interphase Prophase IPMATC Metaphase “I pee, Matt see!” Anaphase Telophase Cytokinesis

Stages of Mitosis Get ready to write! Get ready to write!

Cell Pictures/Labeling You need to draw how the cell looks for EACH stage of mitosis You must LABEL the parts of the cell However, for each additional picture, you only need to label the NEW structures Draw example drawing

Chromatin is NOT condensed into chromosomes yet (can’t see it) Interphase* NOT part of mitosis (precedes mitosis) Includes stages G1, S, G2 Cellular contents (organelles) copied Genetic material (chromatin) copied Checked for mistakes Chromatin is NOT condensed into chromosomes yet (can’t see it) Stages from: http://www.ivyroses.com/HumanBody/Cells/Cell-Division_Mitosis-Diagram.php

Prophase Prophase* d Early Prophase Late Prophase Chromatin condenses into chromosomes (now visible) Nucleolus disappears Nuclear envelope breaks down Two centrosomes form; create mitotic spindle Prophase*

Metaphase* Easiest stage to identify Chromosomes align down the middle Known as the “metaphase plate” Microtubules attach to centromeres of sister chromatids

Anaphase* Early Anaphase Late Anaphase Microtubules pull sister chromatids apart (centromeres split) Individual chromosomes are pulled by the microtubules to opposite poles (same amount of genetic material on either side) Anaphase*

Telophase* Begins after chromosomes stop moving “Reverse of prophase” Begins after chromosomes stop moving Spindle fibers dissolve Chromosomes uncoil and revert to chromatin form A new nuclear envelop forms around each chromatin mass (forms nucleus) Nucleoli appear Cleavage furrow forms at site of metaphase plate (middle)

Cytokinesis* Cytoplasm pinches inward (at the cleavage furrow) until cell is divided into two identical daughter cells Organelles reappear Both cells can now start the process again…

Interphase (Begins Again) d

Animal Cell vs. Plant Cell

Identify the stages! Pick people to come up.

Exit Ticket: Identifying Stages of Mitosis What’s an easy way to remember the stages? IPMATC Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis “I pee, Matt, see!”