Cell Division
Chromatin
Composed of ______________ and _____________________________
Functions:
-
Package DNA into a ___________________ which will _______________________________
Regulate ________________________________________________________ and gives us our
___________________________
Found in the nucleus of _________________________________________________________________
Chromosome
Condensed ___________________________________
Each Chromosome contains one molecule of ________________________________
Function: pass on genetic info during ______________________________________________________
Found in cells that are __________________________________________________________________
Humans have ____________ ___________________ of chromosomes – (_____________ total)
(one from ____________ and one from ________________________)
Parts of a chromosome
Karyotype: The complete set of ___________________________________________________________
Different organisms contain __________________________________________ of chromosomes
Humans contain __________ chromosomes or _________________ pairs
What is Cellular Reproduction?
Process by which _______________________________________________________________________
All cells are derived from__________________________________________________________________
Cell Division in Eukaryotic Cells
•
Eukaryotic cells reproduce by two different type of cellular division depending on the type of cell
1. Mitosis
•
Used by ____________________________________
•
Produces new cells that are __________________________________________
2. Meiosis
•
Used to form _________________________________________
Cell Division Vocabulary
1. Centrioles-
2. Centromeres-
3. Spindle fibers-
4. Microtubules-
Division in Somatic Cells (BODY CELLS or non sex cells)
•
Somatic cell cycle is divided into 3 major steps
1. Interphase
2. Mitosis
3. Cytokinesis
Mitosis
STEP
Growth Phase (G1)
Synthesis Phase
Growth Phase 2 (G2)
Prophase
What happens?
1.
2.
3.
1.
1.
2.
3.
4.
1. Chromatin condenses
into___________________
2. ________________ begin to
move to opposite ends of the cell
3. Nuclear envelope
___________________
4. _________________ attach to
chromosomes
Metaphase
1. Spindle fibers align the
chromosomes at
_____________________________
2. “_____________________”
Anaphase
1.
Telophase
2.
1.
2.
3.
Cytokinesis
In animal cells:
- A contractile ring is formed
- ring constricts parent cell until
two daughter cell are formed
In plant cells:
A cell plate is formed
The cell plate divides the daughter
cells and becomes the cell wall
Picture