Linkage

Autosomal linkage

  • two or more genes on same chromosome

  • Do not assort independently

  • Inherited together

  • Linkage reduces the number of phenotypes resulting from a cross

Recessive epistasis - 9:3:4

Dominant epistasis - heterozygous = 12:3:1 or 13:3 = antagonistic dominant epistasis

Complementary epistasis - 9:7