<P> Reference genomes can be accessed online at several locations, using dedicated browsers such as Ensembl or UCSC Genome Browser . </P> <P> The length of a genome can be measured in multiple different ways . </P> <P> A simple way to measure genome length is to count the number of base pairs in the assembly . </P> <P> The golden path is an alternative measure of length that omits redundant regions such as haplotypes and pseudoautosomal regions . It is usually constructed by layering sequencing information over a physical map to combine scaffold information . It is a' best estimate' of what the genome will look like and typically includes gaps, making it longer than the typical base pair assembly . </P>

Where did the dna sample for the human genome project come from