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Lap-Chee Tsui (1950-)

By: Kristina Winikates | Published: Nov 10, 2011

Lap-Chee Tsui is a geneticist who discovered the cystic fibrosis (CF) gene, and his research team sequenced human chromosome 7. As the location of…

PeopleTsui, Lap-CheeCystic FibrosisReproductionBiography
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Henry Hubert Turner (1892–1970)

By: Megha Pillai | Published: Jun 06, 2024

Henry Hubert Turner was a physician and researcher who studied hormones and human development in Oklahoma City, Oklahoma, during the twentieth…

Turner SyndromeNoonan SyndromeKlippel-Feil SyndromeEndocrine System DiseasesEndocrine Glands

Calvin Blackman Bridges (1889-1938)

By: Kevin Gleason | Published: May 19, 2017

Calvin Blackman Bridges studied chromosomes and heredity in the US throughout the early twentieth century. Bridges performed research with Thomas…

DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutation

"Presence of Fetal DNA in Maternal Plasma and Serum" (1997), by Dennis Lo, et al.

By: Cassidy Possehl | Published: Mar 07, 2017

In the late 1990s researchers Yuk Ming Dennis Lo and his colleagues isolated fetal DNA extracted from pregnant woman’s blood. The technique enabled…

AmniocentesisChorionic Villus SamplingFetusObstetricsDNA

"The Effects of Wing Bud Extirpation on the Development of the Central Nervous System in Chick Embryos" (1934), by Viktor Hamburger

By: Lijing Jiang | Published: Nov 22, 2010

German embryologist Viktor Hamburger came to the US in 1932 with a fellowship provided by the Rockefeller Foundation. Hamburger started his research…

LiteraturePublicationsExperimentsNervous SystemChicks

The Marine Biological Laboratory Embryology Course

By: Jane Maienschein | Published: Oct 24, 2007

The Marine Biological Laboratory (MBL) in Woods Hole, Massachusetts, began in 1888 to offer opportunities for instruction and research in biological…

OrganizationsMarine Biological Laboratory (Woods Hole, Mass.)EmbryologyMarine laboratoriesWhitman, Charles Otis, 1842-1910

The Y-Chromosome in Animals

By: Dorothy R. Haskett | Published: May 28, 2015

The Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the…

Y ChromosomeSex ChromosomesEmbryosDNAChromosomes

Hartsoeker's Homunculus Sketch from Essai de Dioptrique

By: Cera R. Lawrence | Published: Aug 14, 2008

This embryology image is a pencil sketch by Nicolaas Hartsoeker, published as part of his 1694 French-language paper entitled Essai de Dioptrique, a…

SpermatozoaSperm

Calvin Bridges’ Experiments on Nondisjunction as Evidence for the Chromosome Theory of Heredity (1913-1916)

By: Kevin Gleason | Published: May 18, 2017

From 1913 to 1916, Calvin Bridges performed experiments that indicated genes are found on chromosomes. His experiments were a part of his doctoral…

DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutation

Barbara McClintock's Transposon Experiments in Maize (1931–1951)

By: Federica Turriziani Colonna | Published: Feb 09, 2017

Barbara McClintock conducted experiments on corn (Zea mays) in the United States in the mid-twentieth century to study the structure and function of…

TransposonsCornCytogeneticsChromosomesGenetics