Wilhelm Ludvig Johannsen helped lay the foundation for the modern science of genetics. His studies with bean plants enabled him to distinguish between genotype (characteristics that can undergo natural selection) and phenotype (characteristics...

Wilhelm Johannsen, whose family did not have the financial means to provide him a college education, served as an apprentice to a pharmacist in 1872 and taught himself chemistry and botany. Johannsen's interest in botany flourished when he became an...

1857-1927 Danish Geneticist and Botanist Wilhelm Johannsen is considered one of the founders of genetics. His research provided evidence supporting the mutation theory of Hugo de Vries (1848-1935), which holds that there are sudden, spontaneous...

Wilhelm Ludvig Johannsen (February 3, 1857 - November 11, 1927) was a Danish botanist, plant physiologist and geneticist. He was born in Copenhagen. Very young, he was apprenticed to a pharmacist in 1872 and worked in Denmark and Germany, passing his...

JAKE JOHANNSEN -- With Carl Perry and Colin Quinn at Catch a Rising Star last night, through Saturday. CAMBRIDGE - Seeing a comic on television can be a far different experience from catching him in a nightclub. Look no further than Jake Johannsen,...

Robin JohaiinSen says her favorite color these days is red. The Philadelphia-born soprano, who sings Papagena at Deutsche Oper Berlin this month, explains that as a DOB foi contract artist, " get my schedule very late. The theater needs to know where we are...