1. Variation 1

2. Variation
Differences between members of the same species are referred to as variation.
In this classroom there is a large variation including traits such as;
Height, mass, eye colour, skin pigmentation, hair colour, ear shape, eye shape, hairline shape, tongue rollers/non-tongue rollers, left-right handed.

3. Non-visible Variation
There are also non-visible variations such as blood type etc.

4. Inheritable v’s Non-inheritable Variation
Characteristics which we inherit from our parents are called inheritable variation.
Characteristics which are a result of our surrounding environment are called non-inheritable variation.

5. Read the list of characteristics below and classify them in a Venn Diagram. Some characteristics may fit into both categories.
Eye colour blood type skin colour
Scar tissue freckles hair colour
Writing hand dimples ear lobe shape
Height hair line shape mass
Personality intelligence

6. Venn Diagram
Inheritable Both
Inheritable Both Environmental

7. Continuous Variation
Characteristics that have a wide range of possibilities and which are measured, are examples of continuous variation e.g. height.

8. Discontinuous Variation
Characteristics that have a limited range of possibilities, and which are not measured, are examples of discontinuous variation e.g. eye colour.

9. Continuous or Dis-continuous??
Body mass
Writing hand
Blood type
Length of big toe
Ability to roll tongue
Hair line shape
Hitchhiker’s thumb
Ear lobe shape