Cell Division lab reports
I. Date of Practicum: October 22, 2014
II. Practicum Title: Cell Division
III. Purpose of Practicum:
After doing the lab is
expected to explain the stages that occur in mitotic division.
IV. Basic theory
The ability of
reproducing organisms to produce their own kind is one of the best traits to
distinguish living beings from a conceptual material with the inanimate Latin
'cellulite cellular' axis. The unique capacity of producing this offspring,
like all biological functions, has a cellular basis. Rudolf Virchow a German
doctor 1855 sums up means every cell is derived from a cell (Campbel, 2008:
244).
In
the Cell Cycle Journal (2008: 1) Explains, 'that all complex organisms
originate from a single fertilized eeg through cell division, the cell number
increases, the cell then becomes specialized and turns into its respective
functions''.
Sipahatur (2007: 25)
explains, '' The cell cycle is a cell activity that occurs from one cell
division to the next division. The cell cycle includes two phases, namely: the
phase of preparation (interphase) and phase division (mitosis). In the
interfase, it usually covers about 90% of the cell cycle. At the interphase the
cell grows and makes copies of the chromosomes as cleavage for preparation for
cell division.
V. Tools and Materials
A. Provide a
longitudinal root end sequence (Allium ceppa)
B. Microscope
C. Oil immersion
VI. Ways of working
1. With the available
preparations, observe under a microscope and look for the steps that occur in
the main characteristic purchase:
A) Prophase: -
Chromatin grains have been transformed into yarn-
Thread, each chromosome
splits into 2 chromatins and the centromere has not split
-
The core wall and the core child disappear
- Centriol split couple
(in plants have no centriol) and move toward opposite pole.
B) Metaphase: -Each
chromosome from 2 chromatind to the middle
Cells and assembled on
the equator plane
-There are yarns
C) Anaphase: - Spread
centromere, each strucromatid
-Any separate piece of
chromatide from his partner goes to the opposite pole.
D) Telophase: -
Chromosomes gather at the poles
- Membentukya core
membrane in the core child
2. The formation of
separation walls
3. Draw the found phase
and give the information.
VII. Observation result
VIII. Discussion
From
the results of the practicum can be seen differences that occur starting from
the profase, metaphase, anaphase, and telofase.
1. Prophase stage: is
the stage where mitotic cleavage requires the most energy. The events that take
place as follows chromatin grains have turned into chromosome threads, each
chromosome splits into 2 chromatids and the centromere has not split, the core
wall and the nucleus child disappears, the centriol couple splits and moves
toward the opposite pole.
2. Metaphase: this
stage of the chromosome lies in the equatorial plane associated with the
spindle yarn. In this phase the chromosomes appear most clearly visible so that
the numbers are easily identifiable. Metaphase is a phase that requires little
energy and the shortest time.
3. Anaphase: when
anaphase centromere divides, then the spindle thread pulls the chromosome
toward the opposite cell pole. The movement of chromosomes is influenced by the
enzyme dynein.
4. Telophase: at this
stage the following events occur:
The chromosomes turn
into chromatin yarns, membranes and nuclei are reshaped, cytokinesis occurs so
that 2 cells are identified with the original cell.
XI. Conclusion
1. Cell division is the
ability of cells to produce new cells.
2. The eukaryotic cell
division takes place simply, while the prokaryotic division of genetic material
is exactly and the same.
3. Cell division there
are 2 types that is directly (amitosis) and indirect (mitosis, and meosis).
4. The division of
mitotic cleavage that occurs due to the division of the nucleus is preceded by
the formation of sperm coils that occur in somatic cells and germ cells (gern
cells).
5. Amitosis division is
a division that does not pass through the sequence of certain stages.
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