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.

Cell Division lab reports