Between 1984 and 2003, scientists mapped the human genome, which means they determined the pattern of billions of genes that make a human a human. Originally, it took years to map a single person’s total genome. By 2014 multiple genomes could be mapped in one day.

Mapping a genome requires analyzing an enormous amount of genetic information. More powerful computer technology made it possible to process that information much faster, reducing the time from years for one genome to mapping multiple genomes in a day. This is not a change to Mendel’s law of dominance or a result of discovering how germs work.

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