A2 Biology - Hardy-Weinberg principle (OCR A Chapter 20.5)
12:36
A2 Biology - Factors affecting evolution (OCR A Chapter 20.5)
14:15
A2 Biology - Phenotypic ratios (OCR A Chapter 20.4)
17:57
A2 Biology - Monogenic inheritance (OCR A Chapter 20.2)
8:27
A2 Biology - Speciation (OCR A Chapter 20.6)
5:31
A2 Biology - Polymerase chain reaction (PCR) (OCR A Chapter 21.1)
18:01
A2 Biology - Dihybrid inheritance + Unexpected phenotypic ratios (OCR A Chapters 20.3-4)
5:08
A2 Biology - Homeobox genes (OCR A Chapter 19.3)
11:42