It may be that these small differences are heritable, such as those that form the basis of Johannsen's pure lines.
Johannsen's work was simplified because he started with pure lines.
Some recent experiments by Professor Johannsen of Copenhagen set the matter in a different light.
Johannsen caused some of the crusaders to be executed, an act strongly reproved by the monkish chroniclers.
Johannsen worked with the common bean, weighing the seeds or else measuring them.
