A complete lesson covering section 5.1.1 b and c of the OCR Biology specification- how gene linkage and epistasis can affect the phenotypic ratios and how this can be investigated using Chi square.
The lesson starts by introducing sex linkage and then includes some examples of genetic crosses involving colour blindness. It then looks at autosomal linkage again using example crosses to support. The lesson the goes on to look at both recessive and dominant epistasis again using lots of examples to support understanding.
The lesson closes by introducing the Chi square test
As well as the examples the lesson includes lots of exam questions to show how the skills could be assessed
I aim to reduce photocopying so all resources are in the PPT (62 slides in total)
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£3.00