Unique sequence: 1 to 3 copies per genome, single copy, low copy, non-repetitive DNA (e.g. most coding genes, regulatory sequences)
Moderately repetitive DNA: 10 to 10,000 copies per genome, generally dispersed repeats, occasionally clustered (i.e. gene families) (e.g. rRNA and tRNA genes, histone genes)
Highly repetitive DNA: 100,000 to 1 M copies per genome, generally found as tandem repeats (e.g. centromeric DNA, telomeres DNA, satellite DNA, some transposons)