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  1. Oscar Hertwig (21 April 1849 in Friedberg – 25 October 1922 in Berlin) was a German embryologist and zoologist known for his research in developmental biology and evolution. Hertwig is credited as the first man to observe sexual reproduction by looking at the cells of sea urchins under the microscope. [1] Biography

  2. Oct 21, 2023 · Oskar Hertwig, (born April 21, 1849, Friedberg, Hessen—died October 25, 1922, Berlin), German embryologist and cytologist who was the first to recognize that the fusion of the nuclei of the sperm and ovum was the essential event in fertilization.

  3. Apr 17, 2019 · Wilhelm August Oscar Hertwig (April 21, 1849 – October 25, 1922) made his great discovery right at the beginning of a long scientific career, which made him an eminent zoologist and scholar of the theory of evolution. In those early days, he formed half of a brilliant scientific duo with his brother Richard, born a year later.

  4. Nov 1, 2007 · Wilhelm August Oscar Hertwig contributed to embryology through his studies of cells in development and his discovery that only one spermatozoon is necessary to fertilize an egg. He was born 21 April 1849 to Elise Trapp and Carl Hertwig in Hessen, Germany.

  5. Dec 1, 2023 · Oscar Hertwig (1849-1922) was a German embryologist and anatomist who first identified in amphibia tooth development, and was subsequently named Hertwig's epithelial root sheath (HERS). In amphibia, this is a permanent structure. In mammals, this is a transient structure, assembled during early tooth root formation and elongation.

  6. ONE of the founders of the science of heredity and one of Germany's most brilliant embryologists and comparative anatomists, Wilhelm August Oscar Hertwig was born a century ago, on April 21,...

  7. Mar 24, 2011 · The process of meiosis was first described in the mid-1870s by Oscar Hertwig, who observed it while working with sea urchin eggs. Edouard Van Beneden expanded upon Hertwig’s descriptions, adding his observations about the movements of the individual chromosomes within the germ cells.

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