The Cell Cycle
Cell Size
Surface Area
(length x width x 6)
Volume
(length x width x height)
Ratio of Surface Area
to Volume
Why Divide?
A...
10-2 Cell Cycle
G1 Phase
S Phase
G2 Phase
M Phase
Interphase
– G1- cell grows, normal
functions of life
– S Phase – DNA
re...
Chromosomes
In Interphase, chromosomes
appear as chromatin
When mitosis begins, chromatin
condenses to form visible chromo...
Mitosis - Prophase
Chromosomes condense
Nuclear membrane disappears
Spindle fibers form as centrioles move toward
poles
Mitosis - Metaphase
Chromosomes line
up along the cell’s
center
Chromosomes
attach to spindle
fibers at the
centromeres
Mitosis - Anaphase
Sister chromatids
separate and
move toward
poles
Mitosis – Telophase
and Cytokinesis
Telophase – last step of mitosis
– Individual chromosomes gather
at poles
– Nuclear me...
Mitosis in Plant
vs. Animal Cells
Plant Cells Animal Cells
Spindle
Fibers
Stages of
mitosis
(PMAT)
No
centrioles
Cell plat...
Another Look at Mitosis
Onion Cells
Mitosis in a Lily Cell
Mitosis in Whitefish Cells
Mitosis Review
How many chromosomes did
this cell start with?
– FOUR
During which phase are
sister chromatids separated?
–...
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Cell cycle slides for Moodle

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Cell cycle slides for Moodle

  1. 1. The Cell Cycle
  2. 2. Cell Size Surface Area (length x width x 6) Volume (length x width x height) Ratio of Surface Area to Volume Why Divide? A higher surface area/volume allows the cell to move materials in and out more efficiently Smaller cells have higher SA/Vol. ratios
  3. 3. 10-2 Cell Cycle G1 Phase S Phase G2 Phase M Phase Interphase – G1- cell grows, normal functions of life – S Phase – DNA replicates – G2- cell grows and prepares for mitosis M Phase – Mitosis – Cell division
  4. 4. Chromosomes In Interphase, chromosomes appear as chromatin When mitosis begins, chromatin condenses to form visible chromosomes Sister chromatids are identical halves of a duplicated chromosome • Chromatids are joined at the centromere
  5. 5. Mitosis - Prophase Chromosomes condense Nuclear membrane disappears Spindle fibers form as centrioles move toward poles
  6. 6. Mitosis - Metaphase Chromosomes line up along the cell’s center Chromosomes attach to spindle fibers at the centromeres
  7. 7. Mitosis - Anaphase Sister chromatids separate and move toward poles
  8. 8. Mitosis – Telophase and Cytokinesis Telophase – last step of mitosis – Individual chromosomes gather at poles – Nuclear membrane reforms Cytokinesis – follows telophase – Cell pinches in half – Two cells form • Animal Cells – cleavage furrow • Plant Cells – cell plate
  9. 9. Mitosis in Plant vs. Animal Cells Plant Cells Animal Cells Spindle Fibers Stages of mitosis (PMAT) No centrioles Cell plate forms between cells Cell pinches at cleavage furrow Centrioles
  10. 10. Another Look at Mitosis Onion Cells Mitosis in a Lily Cell Mitosis in Whitefish Cells
  11. 11. Mitosis Review How many chromosomes did this cell start with? – FOUR During which phase are sister chromatids separated? – ANAPHASE How many chromosomes are in EACH daughter cell? – FOUR

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