genomic sequence set copy number complement A set of genomic sequences (a biological sequence that is of genomic origin). A 'genomic *sequence* set' differs from a 'genomic *feature* set' in that we are counting how many copies of the same *sequence* exist in a genome, as opposed to how many of the same *sequence feature*. 'Genomic sequence sets' are useful for describing things like 'copy number complements', which are concerned only with how many copies of a sequence exist in a genome, regardless of the location where these reside. By contrast, 'genomic feature sets are useful for representing things like 'single locus complements', where members are sequence features whose identity is dependent on their location. biological sequence set