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Introduction to Cell Cycle How Organisms Grow. Cellular Reproduction We ALL need it and do it.

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Presentation on theme: "Introduction to Cell Cycle How Organisms Grow. Cellular Reproduction We ALL need it and do it."— Presentation transcript:

1 Introduction to Cell Cycle How Organisms Grow

2 Cellular Reproduction We ALL need it and do it.

3 How are these children different from you and I? They have a genetic disorder

4 Cell reproduction depends on… 1.Cells making more cells = cell division 2.New cells being working replicas of the original cell. Parent Cell Cell division Daughter cell Daughter Cell

5 Cell Theory States that ALL cells come from preexisting cellsStates that ALL cells come from preexisting cells Cell division is the process where new cells are produced from one cellCell division is the process where new cells are produced from one cell –The result is two cells that are identical to the original, parent cell.

6 Why ALL Need Cellular Reproduction: If unicellular:If unicellular: –Needed for individual reproductio n –*Binary Fission AsexualAsexual If multicellular: -Needed for reproduction -Needed for growth -Needed for repair and replacement

7 Cell reproduction depends on… 1.Cells making more cells = cell division 2.New cells being working replicas of the original cell. Parent Cell Cell division Daughter cell Daughter Cell

8 How does all of this occur? Q1 Where is the information used to “control” the cell located?Where is the information used to “control” the cell located? –The Nucleus Q2 What is located in the NucleusWhat is located in the Nucleus –DNA –Chromosomes

9 What is inside the Nucleus The nucleus contains DNAThe nucleus contains DNA –The cells instrument book DNA is packaged into structures called chromosomesDNA is packaged into structures called chromosomes Before cell reproduction, it must copy the chromosomesBefore cell reproduction, it must copy the chromosomes –This copy must be accurate WHY?

10 How does all of this occur? Q3 What must be done to make sure each new cell gets a set of “control” information?What must be done to make sure each new cell gets a set of “control” information? –The contents of the nucleus must be COPIED. –This is called replication. –Replication makes sure to get one complete set of contents into each of the new cells

11 How does all of this occur? Q4 What is the name of the process or processes that make sure this gets done?What is the name of the process or processes that make sure this gets done? –Mitosis = nuclear division, body cells –Meiosis = nuclear division, sex cells –Cytokinesis = division of the cytoplasm

12 Set-up Label each of the flapsLabel each of the flaps –1 st : Cell Cycle –2 nd : Interphase –3 rd : Prophase –4 th : Metaphase –5 th : Anaphase –6 th : Telophase Write up and down on flapWrite up and down on flap

13 Set-up Cont. Fold up first flap to expose glue portion. You will take cell cycle notes hereFold up first flap to expose glue portion. You will take cell cycle notes here Continue trend for each labeled flapContinue trend for each labeled flap

14 1 st Flap: Cell Cycle Write length wiseWrite length wise Paste picture of the Cell Cycle here (The dial chart looking one)Paste picture of the Cell Cycle here (The dial chart looking one) Cell grows, prepares for division, divides to form 2 daughter cells, an exact copyCell grows, prepares for division, divides to form 2 daughter cells, an exact copy

15 2 nd Flap: Interphase Includes 3 PhasesIncludes 3 Phases Paste interphase picture here.Paste interphase picture here. G1: Cells increase in size and make new proteins and organelles.G1: Cells increase in size and make new proteins and organelles. Synthesis (S): Chromosomes are replicated and synthesis of DNA molecules occursSynthesis (S): Chromosomes are replicated and synthesis of DNA molecules occurs G2: Shortest phase, used as check system. Is cell ready?G2: Shortest phase, used as check system. Is cell ready?

16 3 rd Flap: Prophase 1 st Phase (along top)1 st Phase (along top) Paste Prophase picture here.Paste Prophase picture here. Longest phaseLongest phase Chromosomes visibleChromosomes visible Centrioles separateCentrioles separate Envelope disappearsEnvelope disappears Draw picture of prophase (pg247)Draw picture of prophase (pg247)

17 4 th Flap: Metaphase 2 nd Phase (along top)2 nd Phase (along top) Paste Metaphase picture here.Paste Metaphase picture here. Lasts few minutesLasts few minutes Chrom. Line up across centerChrom. Line up across center Microtubules connect the centromere to each chrom.Microtubules connect the centromere to each chrom. Draw pic. Of metaphase (pg 247)Draw pic. Of metaphase (pg 247)

18 5 th Flap: Anaphase 3 rd Phase (along top)3 rd Phase (along top) Paste Anaphase picture here.Paste Anaphase picture here. Sister chrom. Separate toward polesSister chrom. Separate toward poles Ends when chrom. Stop movingEnds when chrom. Stop moving Draw pic of anaphase (pg 247)Draw pic of anaphase (pg 247)

19 6 th Flap: Telophase 4 th Phase (along top)4 th Phase (along top) Paste telophase picture here.Paste telophase picture here. Nuclear envelope reformsNuclear envelope reforms Mitosis completeMitosis complete Draw picture of telophase (pg 246)Draw picture of telophase (pg 246)

20 Cytokinesis 7 th flap7 th flap This is the division of the cytoplasm.This is the division of the cytoplasm. Hand draw cytokinesis here. (It looks similar to telophase except the cells are completely separated.Hand draw cytokinesis here. (It looks similar to telophase except the cells are completely separated.


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