California Institute of Technology

Boris Ephrussi (1901-1979)

Boris Ephrussi (1901-1979)

Boris Ephrussi studied fruit flies, yeast, and mouse genetics and development while working in France and the US during the twentieth century. In yeast, Ephrussi studied how mutations in the cytoplasm persisted across generations. In mice he studied the genetics of hybrids and the development of cancer.

The Debate over DNA Replication Before the Meselson-Stahl Experiment (1953–1957)

The Debate over DNA Replication Before the Meselson-Stahl <a href="/search?text=Experiment" title="" class="lexicon-term">Experiment</a> (1953–1957)

Between 1953 and 1957, before the Meselson-Stahl experiment verified semi-conservative replication of DNA, scientists debated how DNA replicated. In 1953, James Watson and Francis Crick proposed that DNA

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