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.

What most likely allowed scientists to start mapping so much faster?

a change to Mendel’s law of dominance
more powerful computer technology
the discovery of how germs work
new scientists repeating gene experiments