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Early 1990s research conducted by Peter Koopman, John Gubbay, Nigel Vivian, Peter Goodfellow, and Robin Lovell-Badge, showed that chromosomally…
Y ChromosomeTestisEmbryosChromosomesSex ChromosomesIn 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), 1861-1912The 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 ChromosomesThe sex of a reptile embryo partly results from the production of sex hormones during development, and one process to produce those hormones depends…
Sex DifferentiationReproductionAdaptationfetal developmentEmbryologyIn 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 ChromosomesThe 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 ChromosomesEmbryosDNAChromosomesIn 2008 researchers Daniel Warner and Richard Shine tested the Charnov-Bull model by conducting experiments on the Jacky dragon (Amphibolurus…
ExperimentsSex DifferentiationReproductionAdaptationfetal developmentCarl Richard Moore was a professor and researcher at the University of Chicago in Chicago, Illinois who studied sex hormones in animals from 1916…
Moore, Carl R. (Carl Richard), 1892-1955Intersexuality in animalsIntersex peopleHormones, SexSex DifferentiationY-chromosomes exist in the body cells of many kinds of male animals.
Y ChromosomeX chromosomeSex ChromosomesChromosomesSex ChromatinStudies in Spermatogenesis is a two volume book written by Nettie Maria Stevens, and published by the Carnegie Institution of Washington in 1905 and…
LiteratureSpermatogenesisGenetic sex determinationSex DifferentiationEmbryos