Simple or Mendelian traits
These are inherited traits for which the observed phenotypic variation is entirely explained by (bi-)allelic segregation at a single locus and which segregate according to one of basic Mendelian inheritance patterns: autosomal recessive, dominant and codominant.
The relationship between genotype and phenotype is simple: all the observed phenotypic variation can be explained by the variation at a single locus.
Simple traits include autosomal, X-linked and Y-linked traits which can be recessive, dominant
Molecular basis of dominance / recessivity.
Complex Traits
Genetic Linkage
Linkage Disequilibrium
QTL Mapping in Outbred Half-Sib Pedigrees