Topic 16.2 [b]: The roles of genes in determining the phenotype (CIE A-level Biology)

Each of the 5 lessons within this bundle are fully-resourced and cover the content of point (b) of topic 16.2 of the CIE A-level Biology specification which states that students should be able to use genetic diagrams to solve problems which involve the following:

• monohybrid and dihybrid crosses
• autosomal linkage
• sex-linkage
• codominance
• multiple alleles
• gene interactions

Students are guided through the construction of the genetic diagrams for the inheritance of one or two genes and are shown how to analyse the phenotypic ratios to determine whether linkage has occurred or whether a gene interaction is involved. The wide range of activities which includes exam questions with visual mark schemes, differentiated tasks and quiz competitions will maintain engagement whilst providing the students with opportunities to assess their progress against the current topic