Chapter 10-2 Cell Division

Think About It As We Go… 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 S-phase and what occurs during this phase?

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

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

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

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

The Cell Cycle Interphase ________________ Period of the cell cycle between cell divisions

Events of the Cell Cycle G1 _____ Phase Cell _____________ DNA replication Preparation for mitosis Cell division __________________ Growth S G2 M Mitosis & Cytokinesis

Mitosis Mitosis: _________ of the _____________ division Has 4 Phases _________________ division cell nucleus P M A T Prophase Metaphase Anaphase Telophase

Mitosis PMAT _________________ Prophase First Longest visible _______________ phase of PMAT Chromosomes become ____________ __________________________ dissolves ___________________ separate ___________________ begin to form Prophase First Longest visible Nuclear Envelope Centrioles Spindles

Mitosis PMAT

Mitosis PMAT _________________ Metaphase Chromosomes Spindle Fiber ___________________ line up across the center of the cell Each chromosome is connected to a ______________________ Metaphase Chromosomes Spindle Fiber

Mitosis PMAT

Mitosis PMAT _________________ Anaphase Sister Chromatids opposite ___________________________ separate into individual chromosomes Chromosomes move toward ____________ poles Anaphase Sister Chromatids opposite

Mitosis PMAT

Mitosis PMAT _________________ Telophase poles nuclear envelopes Chromosomes gather at the ________ and lose their shape New _____________________________ surround each set of chromosomes Telophase poles nuclear envelopes

Mitosis PMAT

Mitosis Post-PMAT

Mitosis Post-PMAT ________________ Cytokinesis Division of the __________________ Each daughter cell is left with a set of chromosomes _________________ to those of the ______________________ that divided. Cytokinesis cytoplasm identical original cell

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