You should be able to explain why Darwinism and Mendelism were initially thought to be incompatible, and how they were reconciled through the field of population genetics.

You should be aware that quantitative genetics looks at characteristics influenced by many genetic variants and also affected by the environment.

You should understand the concept of a polymorphism and see that these can be defined at the visible, protein and DNA levels.

You should have an outline knowledge of levels of protein variation, and understand how it is possible to measure levels of DNA variation.

You should be able to describe the main features of DNA sequence variation - variation is low in sequences that have major effects on the organism, and the levels of variation seen are higher in unicellular organisms.