• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To investigate the effect of varying phases of mitosis on the duration of each of the phases by measuring the percentage number of cells

Extracts from this document...

Introduction

Name: Nguyen Hong Hanh Class : 5X 1. Aim To investigate the effect of varying phases of mitosis on the duration of each of the phases by measuring the percentage number of cells 2. Introduction Mitosis is a form of nuclear division. It refers to the division of the nucleus that produces two daughter nuclei, each containing an identical set of chromosomes. It is also described as replicative division. During the process, the chromosomes in their replicated state; are precisely separated and their chromatids distributed one to each daughter nucleus. The process can be divided into four phases. These phases vary in terms of their duration. In a tissue where the cells are actively dividing, cells in different phases of mitosis can be easily observed. It can be assumed that when many cells are observed to be at a particular phase, that phase occurs over a long period and vice versa. Hypothesis -The percentage number of cells in prophase is highest while the percentage number of cells in anaphase is lowest. In other words, prophase takes the longest time while anaphase takes the shortest time in mitosis of two roots. ...read more.

Middle

75.0 74.3 63.3 44.0 71.7 70.4 4.8 Metaphase 11.3 6.3 14.3 18.3 32.0 18.9 15.7 3.6 Anaphase 5.7 12.5 2.8 6.7 6.0 5.6 5.4 1.5 Telophase 15.1 6.3 8.6 11.7 18.0 3.8 10.6 5.4 Showing calculations Percentage number of cells for all the samples = [one phase/ ? phases] x 100 Average percentage number of cells = (? percentage number of cells)/(number of samples) 6. Discussion and result Anomalous results There were 6 anomalous readings in the data collected. There are highlighted in tables 3 and 4. Their values differ greatly from those of other replicates. They also clearly do not conform to the trends shown by the values obtained in the other replicates. As a result, they have been excluded when calculating the average percentage change in mass and standard deviation. Results of investigation As shown by the values in table 3 and table 4, there was the largest percentage number of cells at prophase and the lowest percentage number of cells at anaphase. The range of prophase from 56.2% to 70.4% while the range of anaphase from 4.7% to 5.4%. Because many cells are observed to be at particular phase, that phase occurs over a long period of time and vice versa. ...read more.

Conclusion

Conclusion -The percentage number of cells in prophase is highest in four phases and the percentage number of cells in anaphase is lowest in four phases of two roots in mitosis. Hence, prophase takes the longest time and anaphase takes the shortest time in mitosis. This agrees with the hypothesis proposed for the investigation. 8. Evaluation There are various weaknesses and limitations observed in the investigation. They are summarized in the following table together with suggestions for their improvements. Limitation/weakness Evaluation of limitation/weakness Suggestion for improvement Some of cells may be washed away along the process Some of cells may be washed away the chromosomes which is used to recognize the cell in which phase during preparing the root tip slide because the slide is cut very thin and stained with color Repeat the experiment with different slides of each root tip to take the average to minimize the random error when the chromosomes washed away. The area of observation is narrow Select an area of at least 50 dividing cells in the root tips, leading to obtain a significant difference in the number of cells in each stage The area need to be widened to at least 100 or 150 cells. 9. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. The effect of toliet cleaning products on E-coli ...

    However the positions within the two groups could change if the standard deviation was implicated. 3.0.0 Conclusion and evaluation 3.1.0- Conclusion The hypothesis "King White toilet cleaner will most adversely affect (kill)

  2. Ecology Open Investigation Does the geographic location affect the biotic and abiotic ...

    Set a controlled distant from surface level that the sample is taken from. Set the distant to be 8 metres. Use a 1m ruler to measure 8 from, starting from where the water meets the sand when the water is calm.

  1. In this extended essay I am looking at the effect of different kind of ...

    She discovered that, out of the plants in three different chambers, with different circumstances, those exposed to the soothing music grew much better than the others. In one case, the plants had curved in the direction of the music playing device!

  2. Osmosis Experiment. This experiment is to consider how salinity influences osmosis in potato cells.

    Briefly wipe each potato piece before measuring each potato cube 12. Once you measure a potato piece, (using the measuring scale), record the result, and then move to the next potato piece out, etc. 13. Once all the data is recorded analyse the results.

  1. The effect of pvc piping on the breathing/heart rates of male year 12 students

    To ensure that bias is kept to a limit all conditions must be performed on the same day per subject, this means that conditions will not change from one day to the next. Additionally 10 replications will be performed to reach a viable average.

  2. Allelopathy. Open Investigation Will increasing the number of allelopathic sunflower plants effect the ...

    The amount of soil in each pot All pots will be completely filled up with soil. Soil will not be pushed or patted down when filling up the pots but the pots filled with soil will be shaken to allow an even surface of soil.

  1. Biology Internal Assessment - investigate whether the Window and Notching caterpillar share the same ...

    Cabbage trees often suffer from a fungi called Sphaeropsis cordyline which causes leaf spots this made it difficult to distinguish between window feeding sites and other damage to leaves. Sometimes it was difficult to distinguish between feeding sites and other leaf spots which resembled window feeding sites.

  2. Comparing the effect of different antimicrobials on the growth of E.coli

    be tested in it and 5 or 6 dots (depending on the substance they chose) to mark the places the filter paper discs impregnated with the chemical would be placed. A bunsen burner was ignited to ensure a sterile environment for the experiment.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work