wake-up 1. explain the main events of interphase. 2.explain the main events of prophase
DESCRIPTION
Purpose of the Cell Cycle To grow, replace old cells, or reproductionTRANSCRIPT
Wake-up
1. Explain the main events of Interphase.
2.Explain the main events of prophase.
Cell Cycle Summary
Purpose of the Cell CycleTo grow, replace old cells, or reproduction
Location of the Cell Cycle
Within an organisms body cells
What is a Body Cell?
All the cells that make up the “body” of an organism.
All organisms have chromosomes (condensed DNA); Also a specific number
Total Number of Chromosomes in a Human Body Cell
How many chromosomes do other organisms have compared
to humans????
How many chromosomes are in a dog?
78
How many chromosomes
are in a mosquito?
6
How many chromosomes are in a Adders Tongue Fern?
1262Most chromosomes
of ALL organisms
1st Step of the Cell Cycle
Interphase: Cell prepares to divide by
making more organelles and
cytoplasm; Replicates DNA
2nd Step of the Cell CycleMitosis: The replicated DNA is separated
Made up of PMAT
Prophase
DNA coils up into
chromosomes; nucleus
disappears; spindle fibers
appear
Metaphase
Chromosomes line up in the middle of the
cell
Anaphase
Sister chromatids are
pulled to opposite ends
of the cell
Telophase
Opposite of Prophase; DNA
unwinds; spindle fibers
disappear; nucleus
reappears
3rd Step of the Cell Cycle
Cytokinesis: The cell divides the organelles and cytoplasm into the new cell
End Result of the Cell Cycle
Two identical cells with the same number of chromosomes
Interphase MitosisCytokinesis
Summary DiagramDon’t Draw
DNA is in chromatin form
DNA is replicated
during S phase
How many Chromosomes?
3 Chromosomes
DNA is condensed into chromosomes
Metaphase, Anaphase, Telophase
Sister Chromatids are
separated
How many Chromosomes?
3 Chromosomes
How many Chromosomes?
3 Chromosomes in each cell
If an organism has 50
chromosomes and it undergoes
mitosis, how many
chromosomes will be present in
the new cells?
If an organisms diploid number chromosome is 100, how many chromosomes will be
present in the new cells?
If an organism has 18
chromosomes and it undergoes
mitosis, how many
chromosomes will be present in
the new cells?
If an organisms diploid number chromosome is 134,568, how
many chromosomes
will be present in the new cells?
134, 568