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SNC2D
Mitosis and the Cell Cycle
Date:__________
Cell Cycle

Dividing cells follow something called the ______________.
◦ Only ________ of the cell cycle is devoted to cell division (mitosis).
◦ The other 90% is devoted to _____________________________________________________
_________________________.
The Cell Cycle
Interphase

The longest stage of the cell cycle.

During Interphase, the cell carries out all life functions
except division. They include
◦ ______________
◦ _____________________
◦ _________________________.
◦ At this stage, the genetic material (__________),
is in very long invisible strands inside the
nucleus (__________________).

When the cell prepares for division, the ___________________________________________________.
SNC2D: Science (Grade 10 Academic)
Mitosis & The Cell Cycle
DNA

Stands for _____________________________.

Contains all the genetic material for a living organism.

Humans have 23 pairs of _________________ for a total of _____:
◦ 23 from mom, 23 from dad
Cell Division

Occurs in two stages:
A. Mitosis: The division of contents of the nucleus. 4 steps:
1. _________________
2. _________________
3. _________________
4. _________________
B. Cytokinesis: The division of the rest of the cell including:
 Cytoplasm, organelles and cell membrane.
 Each division produces two identical _______________________.
Mitosis
Prophase


Long strands of DNA condense into a compact form called
____________________.
◦ Chromosome contains a portion of DNA.
◦ Since DNA was copied during interphase, each
chromosome contains a pair of identical strands called
___________________.
The chromatids are held together by __________________.

Nuclear membrane dissolves during this time.

__________________ (organelles used in pulling cells apart)
migrate to opposite sides of cell.
◦ ________________ are released by the centrioles to
attach to chromosomes.
SNC2D: Science (Grade 10 Academic)
Metaphase

Chromosomes line up in the ________________________.

Spindle fibres from _____________ attach to _______________
of each chromosome.

All must be in line for mitosis to continue.
Anaphase

Centromere splits and the _______________________
separate.
◦
They are now called ___________________________.
◦
They are pulled by ____________________ to opposite
sides of the cell.
Telophase

Final stage of mitosis.

Daughter chromosomes stretch out, become thinner, and are
no longer visible.
◦ Turn back into __________________.
◦ A new ______________________ forms around
each area of chromatin.

Cell appears to have ____________________.
Cytokinesis

The final stage of _________________.

Cytoplasm divides producing two genetically identical
____________________________.

Different for each type of cell:
◦ ______________: Cytoplasm pinches in half.
◦ ______________: Plate between two cells turn into a
cell wall.
Mitosis & The Cell Cycle
SNC2D: Science (Grade 10 Academic)
Mitosis & The Cell Cycle
Checkpoints in Cell Cycle

Cell division is a very complicated and closely monitored process by the cell.

Specialized proteins in the cell monitor progress. The cell will not divide if:
◦
◦
◦

_______________________________
_______________________________
_______________________________
If the DNA is damaged, cell may either _____________________ or _________________ via the
_______________________________.