Step-by-step practice for monohybrid, codominant, sex-linked and dihybrid crosses and the chi-squared test, with each answer checked as you go.
Genotype and phenotype, and genetic diagrams for monohybrid, codominant, multiple allele and sex-linked crosses, with pedigrees and probability.
Dihybrid crosses with two genes, how autosomal linkage and epistasis change the expected ratios, and how to tell which inheritance pattern you're seeing.
How to use the chi-squared test to decide whether the difference between observed and expected phenotypic ratios is significant, with a worked example.
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