They then assembled the clones into a phylogenetic hierarchy to chart how the cells’ genetic composition had changed over time. ... The same regions were also grouped based on their genetic profile, ...

Nirenberg's Genetic Code Chart, 1961-66 On May 27, 1961, Heinrich Matthaei, a postdoc working with NIH scientist Marshal Nirenberg, placed synthetic polyuracil RNA into 20 test tubes to see what it ...

Debate over figure connecting genes, race and ethnicity reignites concerns among geneticists about how to represent human diversity.