6.1.1 (a) Gene mutations
6.1.1 (b) i Regulation of gene expression at the transcriptional level
6.1.1 (b) ii Regulation at the post-transcriptional level
6.1.1 (b) iii Regulation at the post-translational level.
6.1.1 (c) Genetic control of development
6.1.1 (d) Mitosis and apoptosis in development
