VARIATION

Variation

• Variation is a difference in characteristics.
• There is variation between two different species because we are two completely different species made up of different DNA.

Two types of variation :

• Continuous:
• A wide range of values of certain characteristics (on a scale)
• Height, foot length
• Discontinuous:
• Either you have it of you don't (no in between)
• Eye colour, hair colour

EXAMPLES:

• Eye colour: discontinuous
• Weight: continuous
• shoe size: continuous
• Skin colour: discontinuous
• blood group: discontinuous

Species:

• Species: a group of animals which can reproduce with each other to produce offspring which can also reproduce.

Types of Variation

• Inherited Variation:
• Involves the fertilisation of an egg cell by a sperm cell. When a baby is born looking similar to both parents but not identical, this is because they inherit half of the characteristics from each parent. E.g. eye colour.
• Environmental Variation:
• Variation caused by the things in your surroundings.
• Climate
• Radiation
• Location
• Diet
• Level of activity
• Life style

2 Types of Variation E.G.

• Inherited:
• Eye colour
• Bone structure
• Hair type / colour
• Fingerprint
• Environmental:
• Scars
• Language
• Religion
• Both:
• Skin colour
• Disease
• Weight
• Height

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