Task 1
Assessment criteria 1.1
Q1. (a) ABO blood groups in human are an example of discontinuous variation, whereas height is an example of continuous variation. Describe how these two examples differ in terms of:
(i) Genetic control (i.e. the number of genes involved).
(ii) The effect of the environment on each characteristic.
(iii) The range of phenotypes.
(b) Give one other example of continuous variation and one other example of discontinuous variation.
• Continuous
• Discontinuous
