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Sex Determination in Humans
By: Risa Aria Schnebly
| Published: Jul 16, 2021
In humans, sex determination is the process that determines the biological sex of an offspring and, as a result, the sexual characteristics that they…
Sex DeterminationGenetic sex determinationIntersex peopleDiscrimination against intersex peopleStevens, N. M. (Nettie Maria), 1861-1912
Susumu Ohno (1928–2000)
By: Devangana Shah
| Published: Jun 03, 2025
Susumu Ohno studied chromosome structure and evolution during the twentieth century in the United States. Ohno was one of the first researchers to…
Sequence Analysis, DNAGenes, DuplicateGene DuplicationBarr BodiesBiological Evolution
Mary Frances Lyon (1925–2014)
By: Devangana Shah
| Published: Jul 04, 2025
Mary Frances Lyon studied gene expression and developed the theory of X-chromosome inactivation, also called Lyonization, during the twentieth…
Gene ExpressionX Chromosome InactivationLyon HypothesisLyonizationMutation
“Gene Action in the X-chromosome of the Mouse (Mus Musculus L.)” (1961), by Mary Lyon
By: Devangana Shah
| Published: Jun 04, 2025
In 1961, Mary Lyon, a researcher who studied genetics, published “Gene Action in the X-chromosome of the Mouse (Mus Musculus L.),” hereafter “Gene…
Sex ChromosomesChromosomes, Human, XX chromosomeGenes, X-linkedX Chromosome Inactivation
“Sex Limited Inheritance in Drosophila” (1910), by Thomas Hunt Morgan
By: Kevin Gleason
| Published: May 22, 2017
In 1910, Thomas Hunt Morgan performed an experiment at Columbia University, in New York City, New York, that helped identify the role chromosomes…
DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutation
“A Linkage Between DNA Markers on the X Chromosome and Male Sexual Orientation” (1993), by Dean H. Hamer and Charles A. Thomas.
By: Christina Nguyen
| Published: Apr 13, 2017
In 1993, Dean H. Hamer and colleagues in the US published results from their research that indicated that men with speicifc genes were more likely to…
HomosexualityMale homosexualityGeneticsX chromosomeGenetic sex determination
Theophilus Shickel
Painter (1889-1969)
By: Dorothy Haskett
| Published: Nov 22, 2014
Theophilus Shickel Painter studied the structure and function of chromosomes in the US during in the early to mid-twentieth century. Painter worked…
ChromosomesKaryotypesSex ChromosomesGeneticsLinkage (Genetics)
“A Sex Chromosome Anomaly in a Case of Gonadal Dysgenesis (Turner’s Syndrome)” (1959), by Charles Edmund Ford, K. W Jones, Paul E. Polani, J. C De Almeida, and J. H Briggs
By: Megha Pillai
| Published: Aug 06, 2024
In 1959, Charles Edmund Ford and colleagues published “A Sex Chromosome Anomaly in a Case of Gonadal Dysgenesis (Turner’s Syndrome),” hereafter “A…
Turner SyndromeGonadal DysgenesisGonadal Dysgenesis, XOGonadal Dysgenesis, 45, XAbnormalities, Sex Chromosome