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

Variation - testing a group of students for various attributes caused by genetic and environmental factors.

Extracts from this document...


TOPIC: VARIATION; Objective To investigate the variation of certain characteristics among students of class M04G Introduction Certain characteristic are varied and differed for each person. This might be caused by the genotypes independently, like the blood group, and also caused by both factors; genotypes and the environmental factors, such as skin colors and height. Some of the characteristic have clear different which can be determined in discrete value but some could only be measured as continuous data. In this experiment, a certain characteristics were observed on the students to determine the variation pattern. Research Question Which characteristics are determined by genetic factor, by environmental factor, and which are by both (genetic and environmental factor)? Hypothesis Type of blood groups, ability to roll tongue, presence of ear lobes, hair color, iris color, left or right handed, and hair colors are determined by genetic factor independently. ...read more.


in different characteristic Blood Group A B AB O Number of students 5 7 1 8 Table 2: The number of students in different blood group type Weight intervals (� 0.25 kg) Number of students Height intervals (� 0.05 cm) Number of students 40-44 1 145-149 1 45-49 6 150-154 4 50-54 5 155-159 5 55-59 5 160-164 6 60-64 4 165-169 2 65-69 - 170-174 2 70-74 - 175-179 1 Table 3: The weight and height of the students B. Data Analysis Discussion 1. Variation is differences that occurred in members of population. Variation causes differences in human population. 2. There are 2 forms of variations; continuous variation and discontinuous variation. 3. Continuous variation; variation involves a slight difference in characteristics with a broad range with many intermediate values. ...read more.


This due to students/ sample share the same culture and ethnic seems not showing a big difference in variation. Limitation and Suggestion 1. The sample used is not big enough to show appropriate variation in certain characteristics among the students. The small sample may cause same characteristics varied slightly among the sample. So, it is suggested to take a larger sample to give wider variation. So, the variation can be traced more easily and distinctly. 2. The apparatus and devise used in measuring the weight and height is not precise. The result may not accurate. It is suggested that device should be check and adjust properly. The device also should be in good condition to give appropriate results. Conclusion : Variation in human population controlled by genetic factors, environmental factors and interaction of this 2 factors. Students of M04G showed the variation among each other. Hypothesis is accepted ...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. Environmental Factors affecting plant growth

    In soil, phosphorus is commonly found in chemical forms that cannot be immediately absorbed by plants, so the farmers have to apply phosphorus to the soil for rapid pant growth. Phosphorus is absorbed by the roots of the plant; which is why root growth stops due to deficiency of phosphorus, mostly in the ionic form of either H2PO4- or HPO42-.

  2. IB Genetic Unit Notes

    The chromosomes attach by their centromere to spindle fibres at the equator of the spindle Anaphase II The chromatids separate at their centromeres and are pulled to opposite poles of the spindle. Telophase II The chromatids (now called chromosomes) decondense.

  1. Molecular Genetics: differentiating between various molecular databases

    The number of toes and fingers range 3-5, though the thumb may be absent or vestigial. These similarities suggest that the species will share a few nucleotide basses that code the similar protein. The following pictures of my chosen species also suggest that they are linked together.

  2. Human variation

    The age of all of the students was 16. 2. Equal number of male and female students was tested. 3. The students were selected randomly. 4. Always the hand span of the left hand was measured. The height of all of the students was measured after they had taken their shoes off.

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

    Since the straw is longer the distance air needs to be drawn from increases and air is further compacted, resulting in inhalation becoming more difficult. This means that even less oxygen is taken in translating to the heart having to work even harder to transfer an again decreased volume of oxygen.

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

    18 Mile Swamp Groups 1 2 3 4 Colour Cloudy brown Murky brown N/A N/A Clear Turbidity � 1 NTU 7.00 18.00 // 3.22 30.00 ** 4 to 26 Oxygen Levels � 0.01 mg/l 7.50 6.39 2.70 3.70 2.51 pH Level � 0.01 6.80 5.90 6.07 5.39 6.72 ## Salinity

  1. Comparing the Sexy Sons Hypothesis and the Pathogen Avoidance Models Effects on Sexual Selection

    Analysis of Pathogen Avoidance Model A 2016 study by Pedro Vale and Michael Jardine analyzed female fruit fly (Drosophila melanogaster) behavior when presented with the possibility of becoming infected with a virus. They gathered fruit flies that had previously been infected with a virus and those without an infection history

  2. Biotechnology Assignment: Genetic Screening/Testing

    Predictive testing can identify mutations that increase a person's chances of developing disorders with a genetic basis, such as certain types of cancer. 3. Presymptomatic testing can determine whether a person will develop a genetic disorder before any signs or symptoms appear.

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