Chapter 10 2 Cell Division Think About It

Chapter 10 -2 Cell Division

Think About It As We Go… l l l What do we call the chromosomes when they have replicated? What is the structure that holds the replicated chromosomes together? What is the longest phase of the cell cycle? In what phase of the cell cycle does the cell do most of their growing? What does the “S” stand for in the Sphase and what occurs during this phase?

Chromosomes l Carry the cell’s ______ Genetic Information from _________ one generation to the next. l Made of _____ DNA and _________ Proteins

Chromosomes l Each cell contains a _________ Specific Number of chromosomes 46 l Humans – _______ Apes - 48 l Flies - _______ 8 l Carrot – 18 l Dog - 78 l

Chromosomes l ________ Chromatids l One of two identical “sister” parts of a duplicated chromosome l Centromere ________ l Area where the chromatids of a chromosome are attached

The Cell Cycle l During the cell cycle, grows a cell ______, ________ prepares for ________, division & divides to form 2 daughter cells. ______ Then, each new cell begins the cycle over.

The Cell Cycle l Interphase ________ l Period of the cell cycle between cell divisions

Events of the Cell Cycle G 1 l _____ l Growth Cell _______ S l _____ l Phase Preparation for mitosis M l _____ l Phase DNA replication G 2 l _____ l Phase Cell division Mitosis & Cytokinesis l __________________

Mitosis l Mitosis: _____ division of the _______ cell nucleus l Has 4 Phases P l _________ Prophase M l _________ Metaphase A l _________ Anaphase T Telophase l _________

Mitosis PMAT l _________ Prophase l First ________ phase of PMAT l ________ phase of PMAT Longest l visible Chromosomes become ______ l _____________ dissolves Nuclear Envelope l Centrioles __________ separate l __________ begin to form Spindles

Mitosis PMAT

Mitosis PMAT l _________ Metaphase l Chromosomes __________ line up across the center of the cell l Each chromosome is connected to a ___________ Spindle Fiber

Mitosis PMAT

Mitosis PMAT l _________ Anaphase l Sister Chromatids ______________ separate into individual chromosomes l opposite Chromosomes move toward ______ poles

Mitosis PMAT

Mitosis PMAT l _________ Telophase l poles and Chromosomes gather at the ____ lose their shape l nuclear envelopes New _______________ surround each set of chromosomes

Mitosis PMAT

Mitosis Post-PMAT

Mitosis Post-PMAT l ________ Cytokinesis l cytoplasm Division of the _________ l Each daughter cell is left with a set of chromosomes _________ to identical original cell those of the ___________ that divided.

Chapter Homework l Vocab will be on Friday’s Quiz! l Section Assessment Due Friday. l Workbook pages (handout) due Friday. **1 Point of Extra Credit will be given on any assignment turned in before Friday.