Understand the terms 'genotype and phenotype', 'homozygote and heterozygote', 'dominance', 'recessive', 'codominance' and 'multiple alleles'.

Be able to construct genetic crosses and pedigree diagrams.

Understand the inheritance of two non-interacting unlinked genes.

Understand that autosomal linkage results from the presence of alleles on the same chromosome and that the results of crosses can be explained by the events of meiosis, including black/grey body and long/vestigial wing in Drosophila.

Understand sex linkage on the X chromosome, including haemophilia in humans.

Be able to use chi squared tests to test the significance of the difference between observed and expected results.