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As of 2022, Trisomy 21 is the most common type of trisomy, or a condition where the person has three instead of the normal two copies of one of the…
Genetic DisordersGenetic disorders in childrenGenetic disorders in pregnancyGenetic disorders--DiagnosisDown syndromeBorn in Ypsilanti, Michigan, on 2 February 1869, Charles Manning Child was the only surviving child of Mary Elizabeth and Charles Chauncey Child, a…
Polarity (Biology)Life cycles (Biology)MetabolismPhysiologyBiographyThe Inheritance of Acquired Characteristics is a book published in 1924, written by Paul Kammerer, who studied developmental biology in Vienna,…
LiteratureInheritance of acquired charactersEvolution (Biology)adaptationsLaboratory animals--Breeding--ExperimentsOvum Humanum was written and compiled by Dr. Landrum Brewer Shettles while he worked as a doctor in New York. The publication contains an atlas of…
LiteraturePublicationsReproductionHuman DevelopmentOvaThe HeLa cell line was the first immortal human cell line that George Otto Gey, Margaret Gey, and Mary Kucibek first isolated from Henrietta Lacks…
HeLa CellsContinuous cell linesResearch EthicsInformed consent (Medical law)Cervix uteri--CancerIn the twentieth century, researchers developed the oral glucose tolerance test, or OGTT, as a method to diagnose different types of diabetes, a…
TechnologyDiagnosisDiabetes--DiagnosisGlucose tolerance testsBlood GlucoseThe Notch signaling pathway is a mechanism in animals by which adjacent cells communicate with each other, conveying spatial information and genetic…
EmbryologyDevelopmental BiologyEmbryosCell differentiationNotch genesBoris Ephrussi studied fruit flies, yeast, and mouse genetics and development while working in France and the US during the twentieth century. In…
Transplantation of organs, tissues, etc.MutationTissue cultureDrosophilaTissue TransplantationThe gradient theory is recognized as Charles Manning Child's most significant scientific contribution. Gradients brought together Child's interest…
RegenerationJacques Loeb showed that scientists could achieve artificial parthenogenesis with some types of annelid worm eggs through a series of experiments in…
ParthenogenesisExperimentsWorms