People

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Alfred Day Hershey (1908–1997)

By Victoria Hernandez

During the twentieth century in the United States, Alfred Day Hershey studied phages, or viruses that infect bacteria, and experimentally verified that genes were made of deoxyribonucleic acid, or DNA. Genes are molecular, heritable instructions for how an organism develops. When Hershey started to study phages, scientists did not know if phages contained genes, or whether genes were made of DNA or protein. In 1952, Hershey and his research assistant, Martha Chase, conducted phage experiments that convinced scientists that genes were made of DNA.

Format: Articles

Subject: People

Dr. Sturtevant Collecting

By Alfred F. (Alfred Francis) Huettner, b. 1884

Format: Photographs

Subject: Places, People

Joseph Dixon

Format: Photographs

Subject: People

G Dallas Hanna

Format: Photographs

Subject: People

Carleton Rea

Format: Photographs

Subject: People

Pages