1.4 Variation and Inheritance

• What is discrete variation?

  Discrete variation is where measurements fall into distinct groups or categories.

  
  

  e.g eye colour, blood type, hair colour
• What is continuous variation?

  Continuous variation is where a characteristic can have any value over a range, from minimum to maximum.

  
  

  e.g height, weight
• Why do some traits show discrete variation?

  As they have single gene inheritance (they are controlled by only one gene).