Variation 1

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