Cell Reproduction and Mitosis in Living Organisms
How do little elephants grow up
to be BIG elephants?
Why do animals shed their skin?
The answer is…..
Cell Reproduction!!
All living organisms have a life cycle! A life cycle begins
with the organism’s
formation
, is followed by
growth
and
development
and finally ends in
death
.
Two types of reproduction:
asexual
and
sexual
Three reasons why cells
reproduce asexually
1.) Growth
2.) Repair
3.) Replacement
Mitosis
•
The process in which the
nucleus
divides to form two identical
nuclei
•
Interphase
•
Prophase
•
Metaphase
•
Anaphase
•
Telophase
•
Cytokinesis
Interphase
•
Happens before
mitosis
begins
•
Chromosomes
are copied (# doubles)
Prophase
•
1
st
step in Mitosis
•
Mitosis
begins (cell begins to divide)
•
Centrioles
appear and begin to move to the opposite
end of the cell
•
Spindle fibers
form between the poles.
Metaphase
•
2
nd
step in Mitosis
•
Chromatids
(or pairs of chromosomes) line up in the
middle and attach to spindle fibers
Anaphase
•
3
rd
step in Mitosis
•
Chromatids
(or pairs of chromosomes) separate and begin to
move to opposite ends of the cell.
Telophase
•
4
th
step in Mitosis
•
Two new
nuclei
form.
•
Chromosomes appear as
chromatin
(
spaghetti
rather than
rods
)
•
Mitosis
ends
Cytokinesis
•
Occurs after mitosis
•
Cell membrane moves inward to create two
daughter
cells- each with its own
nucleus
and identical
chromosomes
.
REMEMBER!!!!
•
I
nterphase
•
P
rophase
•
M
etaphase
•
A
naphase
•
T
elophase
•
C
ytokinesis
•
I
P
RAY
M
ORE
A
T
T
HE
C
HURCH
Living organisms go through a life cycle that involves cell reproduction. This process includes mitosis, where the nucleus divides to form two identical nuclei. The stages of mitosis - interphase, prophase, metaphase, anaphase, telophase, and cytokinesis - are essential for growth, repair, and replacement of cells. Through a series of steps, cells replicate and divide, ensuring the continuity of life.
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Presentation Transcript
How do little elephants grow up to be BIG elephants?
The answer is.. Cell Reproduction!! All living organisms have a life cycle! A life cycle begins with the organism s formation, is followed by growth and development and finally ends in death. Two types of reproduction: asexual and sexual
Three reasons why cells reproduce asexually 1.) Growth 2.) Repair 3.) Replacement
Mitosis The process in which the nucleus divides to form two identical nuclei Interphase Prophase Metaphase Anaphase Telophase Cytokinesis
Interphase Happens before mitosis begins Chromosomes are copied (# doubles)
Prophase 1st step in Mitosis Mitosis begins (cell begins to divide) Centrioles appear and begin to move to the opposite end of the cell Spindle fibers form between the poles.
Metaphase 2nd step in Mitosis Chromatids (or pairs of chromosomes) line up in the middle and attach to spindle fibers
Anaphase 3rd step in Mitosis Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell.
Telophase 4th step in Mitosis Two new nuclei form. Chromosomes appear as chromatin (spaghetti rather than rods) Mitosis ends
Cytokinesis Occurs after mitosis Cell membrane moves inward to create two daughter cells- each with its own nucleus and identical chromosomes.
REMEMBER!!!! Interphase Prophase Metaphase Anaphase Telophase Cytokinesis I PRAY MORE AT THE CHURCH
