Mendelian genetics (law of segregation, law of independent assortment)
Non-Mendelian inheritance (incomplete dominance, codominance, sex-linked traits)
Patterns of inheritance (autosomal vs. sex-linked, monohybrid vs. dihybrid crosses)
Chromosomal basis of inheritance and gene linkage
Sources of genetic variation (crossing over, independent assortment, random fertilization)
DNA structure, replication, and the role of key enzymes (helicase, polymerase, ligase)