A<unk>  <unk>  is a<unk>  (section of DNA) that correlates with variation of a<unk><unk>  in the phenotype of a population of organisms.<unk> s are mapped by identifying which molecular markers (such as SNPs or AFLPs) correlate with an observed<unk> . This is often an early step in identifying and sequencing the actual genes that cause the<unk>  variation.
Quantitative trait locus
Genomic imprinting
Structural inheritance
Nuclear sexing
Epigenetics
Uniparental disomy
Compound heterozygosity
Low copy repeats