Lesson 44 Cell Cycle Activator Has your body

Lesson 44 Cell Cycle

Activator • Has your body changed in the past six months? • How did you recognize this change? • Are you taller? Did your hair grow? Did you clip your toenails? • Has anyone broken a bone recently? • How does your body repair itself? • Explain your answers

The Cell Cycle • How do we grow? • Our cells divide over and over again • During the cell cycle, a cell grows, prepares for division, and divides into two new cells • These new cells are called daughter cells • Process begins again

Three Main Stages in Cell Division • Stage 1: Interphase • Stage 2: mitosis • Stage 3: Cytokinesis • Looking at the diagram-what stage does a cell spend most of it’s life?

First Stage: Interphase • • Period before cell division Cell growth Makes a copy of it’s DNA And prepares to divide into two cells

First Stage: Interphase • Growing • Grows to full size • Makes new ribosomes and produces enzymes • Copies are made of mitochondria and chloroplast • Copying DNA • DNA replication • 23 chromosomes 46 Chromosomes • Preparing for Division • Creates centrioles (structure that pulls apart chromosomes)

Cell Cycle Video • https: //www. youtube. com/watch? v=Wa. J 8 epy. Ex 2 Q • Brain Break Video • https: //www. youtube. com/watch? v=ws 2 U 4 EUj-CE • People are Awesome

Classwork • Complete the reading and comprehension questions • Work independently for 10 minutes • Try your best • Review with a partner for 5 minutes • Review as a class