This is an analysis of onion root cell tips in different phases of the cell cycle. The purpose of this lab is to observe and be able to identify various stages of the mitosis: Interphase, Prophase, Metaphase, Anaphase, and Telophase.
Hypothesis:.
The interphase would be the most common phase because it's the longest and most cells are new. .
Materials:.
The materials used in this lab are as followed: Light microscope, 2 prepared slides of onion root cell tips, pencil, and paper.
Method:.
When doing this lab place the onion root cell tip directly under light microscope using high power. Slowly move slide till image appears to be clear. Then the next step determines the phases the chromosomes would be classified in. Do this twice with 2 separate slides. After counting and determining all the chromosomes add up the total number in all phases. Then take the total number and divide by the total number in each phase. This then gives you a percentage for each phase.
Results:.
The results followed show the percent of the number of cells in an onion root cell tip. Showing that interphase was the most common and anaphase being the least.
Discussion.
The results and lab show how interphase was the most common. I believe this is because most cells are new and starting mitosis. The results also show that anaphase was the least common. I think its because most cells are still new and not dividing yet.
In doing this lab I noticed that chromosomes are visible in every phase except interphase. I observed that in metaphase and anaphase you see fibers. I also observed that interphase is the only one I saw that had a cell membrane and that there are more cells in interphase rather than cells that are dividing.
Conclusion:.
This lab investigated how interphase in fact would be the most common phase in the cell cycle and anaphase the least. This evidence is consistent with the hypothesis made, proving that my hypothesis would be right.
Both somatic and sex cells go through important cycles called mitosis and meiosis. Mistakes often occur when trying to address mitosis or meiosis. ... Prophase begins to set the stage of differences between mitosis and meiosis. ... For mitosis, the sister chromatids from each chromosome separates. ... Mistakes often occur when trying to address mitosis or meiosis. ...
Comparing and Contrasting: Mitosis and Meiosis There are two types of cellular reproduction, mitosis and meiosis. ... Mitosis is the reproduction and division of any somatic cell to form an identical copy. ... In mitosis, a somatic or diploid cell which contains the maximum amount of genetic material, reproduces its genetic material, and then it splits to form two cells, with exactly the same genetic material s the parent cell and each other. ... These are the differences and similarities of mitosis and meiosis. ...
Mitosis evolved in complex plants and animals for growth and repair. Mitosis, the division of a cell resulting in two identical daughter cells, prolongs an organism's life by replacing old, dead, and damaged cells. In complex animals and plants, mitosis occurs everywhere, except sex cells. ... Meiosis II closely resembles mitosis, except that the DNA does not replicate at interphase. ... The major differences between mitosis and meiosis is that mitosis results in two daughter cells exactly like the parent, whereas meiosis is sexual reproduction, resulting in 4 daughter cells...
Mitosis is the separating of a cell's nucleus while passing on the same chromosomes to each of the two daughter cells. ... Once that occurs, mitosis begins. The first phase of mitosis is called prophase. ... After mitosis, cytokinesis occurs in which the organelles and the cytoplasm of the cell divide in two and then the cell membrane completely pinches into two different cells. All this is known as the cell's life span, but the great detail of this paper is on the process of mitosis. ...
Mitosis is one of the stages in the life cycle of a cell. ... Unlike mitosis, homologous chromosomes pair with one another. ... The differences between meiosis 2 and mitosis is that DNA replication takes place only once during both meiosis and mitosis. ... Mitosis results in two daughter cells. ... The human life cycle uses both mitosis and meiosis. ...
They are binary fission, mitosis, and meiosis. ... Mitosis is a type of cell division that produces two genteically identical cells from a single cell. ... Mitosis is used by many unicellular eukaryotic organisms for reproduction. Multicellular organisms use mitosis for growth, repair, and the cell replacement. ... There are five phases in the mitosis process. ...
Cell division can also be broken down into two reproductive categories: asexual (Mitosis) and sexual (Meiosis). ... Other cells divide when they reach maturity through the Mitosis or Meiosis types of cell division. ... Most cells both eukaryotic and prokaryotic divide through the Mitosis processes which is asexual. ... The genes are mixed up and like shuffled around, not a precise duplicate like mitosis. ... Mitosis and Meiosis do use the same processes, however, the results vary considerably. ...
Mitosis is assessed at the M checkpoint. ... It triggers and exit from mitosis and leads to cytokinesis and G1. ... This initiates the activities that carry the cell cycle into the stages of mitosis. ... G2 cyclin binds to Cdk to form mitosis promoting factor (MPF). ... G2 ends when the level of active MPF exceeds the threshold necessary to trigger mitosis. ...
Cell division involves two process: nuclear division, or mitosis, and cytoplasmic division, or cytokinesis. Although mitosis and cytokinesis are separate events, the term mitosis is often used in a broad sense to include the subsequent cytokinesis, and so the two events constitute the M phase (mitosis) of the cell division cycle. ... As mitosis proceeds, the sister chromatids of each chromosomes separate at the centrioles. ... For example, if some of the chromosomes have not completed their DNA replication during the S phase, the cell will not begin mitosis until the replication is complete...