Download Mitosis Notes 1/17/17 Cell Division Review Cells divide sexually

Mitosis Notes 1/17/17
Cell Division Review

Cells divide sexually and asexually

Prokaryotes divide via _________________________________________ (type of asexual reproduction)
Eukaryotes divide sexually and asexually
 Sexual Reproduction occurs when an egg and sperm fuse (process is called __________________________) to
form a _____________________ (fertilized egg)
 Sperm (XY) and Egg (XX) cells aka sex cells or ______________________ are ____________________ cells
 Body cells (aka _____________________________ Cells) are ________________________ cells that reproduce
asexually in order for growth, repair, and replacement.
Cell’s Life: Divide or Die
Cell Growth Cycle
•
Interphase (___________________)
•
Mitosis (____________________)
•
Cytokinesis (__________________________________)
Interphase (G1, S, G2)
occurs before mitosis begins
•
Time between cell division (_______% of a cells life is spent during this phase)
•
Chromosomes are copied (# doubles)
•
Chromosomes appear as threadlike coils (_____________________) at the start, but each chromosome and its
copy (sister chromosome) change to sister chromatids at end of this phase
MITOSIS
 Division of the nucleus into two identical cells that are the same number and same kinds of chromosomes as the
original cell
 Mitosis occurs in all __________________________ cells (aka body cells) ex. Skin, liver, heart, stomach
 Consists of 4 phases: Prophase, Metaphase, Anaphase, Telophase
Prophase
1st step in Mitosis
•
Mitosis begins (cell begins to ___________________)
•
____________________________ (or poles) appear and begin to move to opposite end of the cell.
•
________________________________ form between the poles.
Metaphase
2nd step in Mitosis
•
____________________________ (or pairs of chromosomes) attach to the spindle fibers.
•
Chromosomes line up at the _______________________ of the cell (Mmmmeta- Mmmmmmiddle)
Anaphase
3rd step in Mitosis
•
Chromatids (or pairs of chromosomes) separate and begin to move to __________________________________
of the cell.
Telophase
4th step in Mitosis
•
Two new __________________ form.
•
Chromosomes appear as chromatin (__________________ rather than rods).
•
Mitosis ends.
Cytokinesis
•
Division of ___________________________ that occurs after mitosis
•
Cell membrane moves inward to create two daughter cells – each with its own nucleus with
_______________________________ chromosomes.
•
Animal Cells- ________________________ moves inward and pinches into two identical ________________
•
Plant Cells- a _________________________ forms in the middle of the cell and eventually a
__________________________ separates the two cells