The Cell Cycle & Cell Division Q2 WK2 D1
science-class.net/PowerPoints/Cell%20Division.ppt
Slide 2
What do we already know? Prokaryotic VS Eukaryotic cells Humans
have Eukaryotic cells All cells have organelles (parts) Each
organelle has a function (job)
Slide 3
Cell Cycle & Cellular Division learning goal I can describe
the purpose, phases and processes of cellular reproduction!
Slide 4
The Cell Cycle
http://www.nobel.se/medicine/laureates/2001/press.html Cell Cycle
cut-out
Slide 5
Cell Cycle G1- Growth phase. A cell grows quickly; largest part
of the cycle. The beginning phase of cell divison. S- Synthesis
phase; cells DNA is copied. Each chromosome consists of 2
chromatids attached at the centromere G2- Second Growth phase. Cell
prepares for the nucleus to divide. A cell will spend nearly 90% of
its life in stages G1 G2! M- Mitosis phase ; nucleus is divided
into 2 nuceli. Each nucleus has same number of chromosomes. C-
Cytokinesis The cytoplasm divides and 2 NEW CELLS ARE FORMED Cell
Cycle cut-out
Slide 6
S Phase: Chromosome Diagram
http://www.biologycorner.com/bio1/celldivision-chromosomes.html
Slide 7
Catching Some Killer Rays Explain why skin cancer might be more
prevalent in California than in Arizona. In 2009, it was reported
that new melanoma cases (dangerous form of skin cancer) was
identified nearly 75% higher in men than women. Explain why some
people can survive skin cancer, while others cant.
http://www.epa.gov/sunwise/doc/az_facts_web.pdf Handout- Catching
Some Killer Rays (Sci. Ntbk)
Cancer Cells & The Cell Cycle Nearly everyone knows of
someone who either has or had cancer. Why is it that some doctors
are able to stop the cancer while others may not survive it? We
will explore how cancer moves through the cell cycle.
Slide 11
Plate Full of Knowledge: Cancer & the cell cycle
http://science.education.nih.gov/supplements/nih1/cancer/activi
ties/activity2_animations.htm
http://science.education.nih.gov/supplements/nih1/cancer/activi
ties/activity2_animations.htm Each person in your group is
responsible for adding scoops (answers) to your plate, based on
each video. You will place your scoop, on the proper section of
your plate, creating a plate full of knowledge -Cancer & the
Cell Cycle activity- gradebook
Slide 12
Cancer & The Cell Cycle: Plate Full of Knowledge- Questions
Video 1 Scoop1: Describe the rate of cells Scoop 2: Describe how
cancer cells grow Video 2 Scoop 1: Describe the cell clock Video 3
Scoop 1: What are tumor suppressor genes? Scoop 2:Describe their
importance Video 4 Scoop 1: What are mutations?
Slide 13
Class discussion: Cancer and the Cell Cycle Video 1 Scoop1:
Describe the rate of cells Scoop 2: Describe how cancer cells grow
Video 2 Scoop 1: Describe the cell clock Video 3 Scoop 1: What are
tumor suppressor genes? Scoop 2:Describe their importance Video 4
Scoop 1: What are mutations?
Slide 14
Cancer Growth- Animation (Video)
http://www.youtube.com/watch?v=WXTsxPPc TEs
http://www.youtube.com/watch?v=WXTsxPPc TEs Stop & Think During
the video, we will pause at specific phases of cancer development,
you will be asked to explain what is happening in that phase
Slide 15
Cancer & the Cell Cycle: Modeling Lets go outside
Slide 16
Cancer Growth- Video Summary Video will be replayed In your
notebook, write a summary of how cancer cells develop and why they
are difficult to stop and what is needed to ensure tumors do not
replicate
Slide 17
Cancer- Active Reading
Slide 18
MITOSIS Q2 WK2 D2
Slide 19
When is mitosis used? Mitosis: reproduction of somatic (body)
cells = cellular division Diploid: full # of chromosomes (2n) = 46
Haploid: half # of chromosomes (n) = 23 Somatic Cells (body cells)
are Diploid Gametes (sex cells) are Haploid
Slide 20
Stages of Mitosis Prophase Metaphase Anaphase Telophase
Slide 21
Interphase: The cell prepares for division What happens? DNA
replicates Organelles replicate Cell increases in size
Prophase: The cell prepares for nuclear division What happens?
DNA condenses into chromosomes, spindles form & nuclear
envelope dissolves. The chromosomes become visible
Metaphase: The cell prepares chromosomes for division What
happens? Chromosomes line up at the center of the cell Spindle
fibers attach from daughter cells to chromosomes at the
centromere
Telophase: The cytoplasm divides What happens? DNA spreads out
2 nuclei form Spindles dissolve Cell membrane pinches in and forms
the 2 new daughter cells
Cytokinesis: Final step in division What happens? Cytokinesis
occurs when the cleavage furrow appears Division of the cytoplasm 2
identical daughter cells form
Slide 32
Chromosome Review Chromosomes (x shaped) Chromatid (1/2 of an
X) Centromere (holds chromatids together) Homologous Pair: 2
chromosomes together are known as TETRAD Asters: Small anchors that
hold centrioles to side of cell