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. Weight and height are determined by both genetic and environmental factors.
Subject of Study
20 students of class M04G.
Methods
1. A survey was carried on the 20 students based on certain characteristics
a) Ability to roll tongue
b) Presence of ear lobes
c) Hair color
d) Iris color
e) Right or left handed
f) Weight
g) Height
h) Type of blood group
2. The data was recorded, analyze and summarized.
Results
A. Data Collection
Table1: The number of students (according to sex) in different characteristic
Table 2: The number of students in different blood group type
Table 3: The weight and height of the students
B. Data Analysis
Discussion
- Variation is differences that occurred in members of population. Variation causes differences in human population.
- There are 2 forms of variations; continuous variation and discontinuous variation.
- Continuous variation; variation involves a slight difference in characteristics with a broad range with many intermediate values. Example; height and weight.
- Continuous variation is caused by genetic factor or environment factor of influenced by interaction of this both factor.
- Discontinuous variation; variation that obviously distinguish and have a few distinct classes. Example; left or right handed and ability to roll tongue.
- Discontinuous variation is solely caused by genetic factor. There are no environmental influences affecting the existence of this variation in human.
- The factor which controlled by genetic factor can be inherited but the others factors cannot be passed to the offspring by sexual production.
- For hair and eyes colour, there is no variation happened within the samples. This due to students/ sample share the same culture and ethnic seems not showing a big difference in variation.
Limitation and Suggestion
- 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.
- 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
