Aim # 50: What are the stages of Mitosis? Date: February 15th, 2017 Aim # 50: What are the stages of Mitosis? HW: Daily Review of Class Notes Finish Practice Worksheet All Labs due Friday Do Now: When do cells divide? What must happen to DNA BEFORE cell division occurs? 3) Draw a duplicated chromosome and label the sister chromatids and the centromere.
Aim #50: What are the stages of mitosis? Biology is the only subject in which multiplication is the same thing as division…
1) What is mitosis? Spindle Fibers Chromosomes Mitosis is the process that divides the cell’s nucleus into two, each with a complete set of genetic material from the parent cell.
2) What is interphase? Phase of cell cycle in which a typical cell spends most of its life in between cell divisions Centriole
3) What is going on within the cell during interphase? Cell grows DNA (chromosomes) replicate Cell prepares to divide Cell
4) What is the Mitotic (M) Phase M Phase- the cells undergo cell division. What does the “M” stands for? Mitosis The dance of the Chromosomes
Stages of Mitosis (PMAT): Prophase: The chromosomes become visible. (Condensation) The centrioles separate and Spindle fibers begin to form. The nuclear membrane breaks down. Centriole Nuclear Membrane Spindle Fibers
Stages of Mitosis (PMAT): Metaphase: The chromosomes line up across the center (Middle) of the cell. Each chromosome is connected to a spindle fiber at the centromere.
Stages of Mitosis (PMAT): Anaphase: The spindle fibers separate the chromatids into individual chromosomes and they are moved apart.
Stages of Mitosis (PMAT): Telophase: The chromosomes gather at opposite ends of the cell. 2) Two new nuclear membranes form. The chromosomes lose their distinct shapes.
6) What is cytokinesis? The cytoplasm pinches and two cells are formed.
What is the end result of Mitosis? 46X 46X 46X + Parent Daughter Cell Daughter Cell Is the genetic material of the daughter cells identical to the parent? Chromosome Number? The same number of chromosomes is maintained from one generation to the next. YES
8) What is the difference between plant and animal cell division? In plants, a Cell Plate forms across the middle of the cell.
Comparing animal and plant Cytokinesis
Big Picture
Let’s Review…
Mitosis Phases Prophase Metaphase Anaphase Cytokinesis Telophase
Interphase Prophase Metaphase (Middle) Anaphase (Away) Telophase (Two)
Which phase are these cells in? Prophase Anaphase
What phase are these cells in? Telophase Metaphase
ANIMAL MITOSIS
PLANT MITOSIS
Brain Pop http://www.brainpop.com/science/cellularlifeandgeneti cs/mitosis/
Date: February 15th, 2017 Aim # 50: What are the stages of Mitosis? HW: Daily Review of Class Notes Finish SISOTIM Packet All Labs due Friday Do Now: What is interphase? How much of the cell cycle is spent during this stage? What does PMAT stand for? What is cytokinesis? How does it differ in plant and animal cells?