In `` Evolution by Gene Duplication '' , he also suggested that vertebrate genome is the result of one or more entire genome duplications ; variations of this idea have come to be known as the 2R hypothesis ( also called `` Ohno 's hypothesis '' ) .
In his book , he also suggested that vertebrate genome is the result of one or more entire genome duplications . Variations of this idea have come to be known as the 2R hypothesis ( also called `` Ohno 's hypothesis '' ) .