Pedigree chart symbols

I II
Include the role of: Shaded vs unshaded symbols, generations (I, II), mating line & offspring

Tracing inheritance patterns

Include the role of: Carrier, recessive allele, autosomal vs sex-linked inheritance

Codominance — ABO blood groups

= antigen A (Iᴸ) = antigen B (Iᵀ)
Include the role of: Codominant alleles (Iᴸ, Iᵀ), multiple alleles, heterozygous phenotype