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Sex-determining Region Y in Mammals
By: Troy Cox
| Published: Dec 31, 2013
The Sex-determining Region Y (Sry in mammals but SRY in humans) is a gene found on Y chromosomes that leads to the development of male phenotypes,…
Y ChromosomeTestisEmbryosChromosomesSex Chromosomes
"Genetic Evidence Equating SRY and the Testis-Determining Factor" (1990), by Phillippe Berta et al.
By: Troy Cox
| Published: Jan 10, 2014
In the late 1980s, Peter Goodfellow in London, UK led a team of researchers who showed that the SRY gene in humans codes a protein that causes testes…
TestisY ChromosomeEmbryosChromosomesSex Chromosomes
Alfred Henry Sturtevant (1891–1970)
By: Kevin Gleason
| Published: May 20, 2017
Alfred Henry Sturtevant studied heredity in fruit flies in the US throughout the twentieth century. From 1910 to 1928, Sturtevant worked in Thomas…
DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutation
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)
"Male Development of Chromosomally Female Mice Transgenic for Sry gene" (1991), by Peter Koopman, et al.
By: Troy Cox
| Published: Jan 28, 2014
Early 1990s research conducted by Peter Koopman, John Gubbay, Nigel Vivian, Peter Goodfellow, and Robin Lovell-Badge, showed that chromosomally…
Y ChromosomeTestisEmbryosChromosomesSex Chromosomes
“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
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
“Causes of Male Infertility: A 9-year Prospective Monocentre Study on 1737 Patients with Reduced Total Sperm Counts” (2016), by Margus Punab, Oliv Poolamets, Piia Paju, Vladimir Vihljajev, Kristjan Pomm, Ruth Ladva, Paul Korrovits, and Maris Laan
By: Logan Hunt
| Published: Sep 20, 2024
In December of 2016, Margus Punab and colleagues published “Causes of Male Infertility: A 9-year Prospective Monocentre Study on 1737 Patients with…
Sperm CountSperm NumberSperm TailSpermSperm Motility
DNA and X and Y Chromosomes
By: Anna Guerrero
| Published: Feb 06, 2017
Y-chromosomes exist in the body cells of many kinds of male animals.
Y ChromosomeX chromosomeSex ChromosomesChromosomesSex Chromatin