OCR Biology A, A level, genetics of living things Chapter 19

One powerpoint with three lessons

1. Mutations and variation
2. Control of gene expression
3. Body plans

The powerpoint contains multiple choice questions, embedded videos, exam questions and animations

Topics covered:
Types of mutations
Effects of mutations
Chromosomal mutations
Why gene expression is important
The 4 ways that genes are regulated
Transcription
Eukaryote – chromatin remodelling
Prokaryote – lac operon
Post-transcriptional
RNA processing/editing (pre-mRNA to mature mRNA)
Translational
Degrading mRNA
Inhibitory proteins
Initiation factors
Post-translational
Addition of non-protein
Modifying AA
Folding/shortening proteins
Modification of cAMP
Definition of homeobox gene
Example of hox gene in animals