first and longest phase of mitosis. the nuclear envelope dissolves (goes away), chromatin coils up...
TRANSCRIPT
Get out your copy
of the “Mitosis
and Cytokinesi
s” handout.
Stage Description of Stage Pr
opha
se
Example Drawings Plant Cell Animal Cell
Phases of Eukaryotic Mitosis
First and longest phase of mitosis. The nuclear envelope dissolves (goes away), chromatin coils up and condenses to form visible chromosomes.
Stage Description of Stage M
etap
hase
Example Drawings Plant Cell Animal Cell
The short second phase of mitosis. The doubled chromosomes become attached to the spindle fibers at their centromeres and move to the equator of the cell.
Phases of Eukaryotic Mitosis
Stage Description of Stage A
naph
ase
Example Drawings Plant Cell Animal Cell
The 3rd phase of mitosis. During this phase, the centromeres split and the sister chromatids are pulled to opposite poles of the cell by the shortening of the microtubules.
Phases of Eukaryotic Mitosis
Stage Description of Stage T
elop
hase
Example Drawings Plant Cell Animal Cell
The final phase of mitosis. Two distinct daughter cells are formed and the cells begin to separate. This stage is indicated by the formation of a cell plate in plant cells and a cleavage furrow in animal cells.
Cell Plate
Cleavage Furrow
Phases of Eukaryotic Mitosis
Why is Cytokinesis important?
Cytokinesis is the division of the cells cytoplasm and all the
cellular organelles that it contains (remember ribosomes,
lysosomes, endoplasmic reticulum, Golgi apparatus, and
mitochondria)
Mitosis guarantees genetic continuity. When mitosis is complete, unicellular organisms remain as single cells, In
multicellular organisms cell reproduction results in cells that work
together as tissues tissues work together to form organs organs to
form organ systems and organ systems form organisms.
Phases of Eukaryotic Mitosis
Break into lab groups and look at
the stages of mitosis in plant and animal cell cards at
your lab tables. Without using your
notes, see if you can arrange them in the correct mitotic
order.
Now use your notes to check your arrangements.
Mow lets look at the “Mitosis In An Onion Root Tip” sheet located on your lab table.
Create a data table similar to the one
below in your biology notebook.
Count the number of cells in each phase of
mitosis and enter the
numbers in your data table.
Enter your data on the spread sheet on the
teacher computer
Analysis Questions
Which phase showed the largest number of active cells?
Explain why this phase, of all the phases, would most likely have the most abundant number of active cells.Were some of the cells difficult to
classify into a particular stage of mitosis?
Explain why or why not.
Share your analysis with at lease two other lab
groups.