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

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To investigate the variation of certain characteristics among students of class M04G


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)?

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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.


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 ...

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