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"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
Congenital Rubella Syndrome (CRS)
By: Erica O'Neil
| Published: Jan 10, 2014
Congenital rubella syndrome (CRS) can occur in children whose mothers contracted the rubella virus, sometimes called German measles, during pregnancy…
RubellaRubella in pregnancyRubella virusPregnancyEmbryos
"Developmental Effects of Endocrine-Disrupting Chemicals in Wildlife and Humans" (1993), by Theo Colborn, Frederick S. vom Saal, and Ana M. Soto
By: Jennifer R. Craer
| Published: Jan 10, 2014
Developmental Effects of Endocrine-Disrupting Chemicals in Wildlife and Humans, was published in 1993 in Environmental Health Perspectives. In the…
LiteratureEndocrine disrupting chemicalsEmbryologyfetal developmentendocrine disruptors
"Screening for Congenital Hypothyroidism" (1991), by Delbert A. Fisher
By: Jennifer R. Craer
| Published: Dec 31, 2013
In his 1991 article Screening for Congenital Hypothyroidism, Delbert A. Fisher in the US reported on the implementation and impact of mass neonatal…
LiteratureCongenital HypothyroidismNewborn infants--DevelopmentCretinismInfant Health Services
"Congenital Cataract following German Measles in the Mother" (1941), by Norman McAlister Gregg
By: Lindsey O'Connell
| Published: Dec 31, 2013
In Australia in the 1940s, Norman McAlister Gregg observed a connection between pregnant women who contracted the rubella virus, or German measles,…
LiteratureCataract in childrenRubellaRubella in pregnancyRubella virus
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
Frog Embryo in the Blastula Stage
By: Chinami Michaels
| Published: Dec 16, 2013
Illustration of the animal-vegetal gradient in Xenopus laevis ( African clawed frog) eggs after fertilization.
BlastulaOrganisms
The Process of Gastrulation in Frog Embryos
By: Chinami Michaels
| Published: Dec 13, 2013
Illustration of the movement of the three hemispheres of cells, the animal cap (dark green) the marginal zone (lime green) and the ventral cap (yel
BlastulaGastrulationEctodermEndodermOrganisms
Oswald Theodore Avery (1877-1955)
By: Samantha Hauserman
| Published: Dec 12, 2013
Oswald Theodore Avery studied strains of pneumococcus of the genus Streptococcus in the US in the first half of the twentieth century. This bacterium…
Bacterial TransformationDNAHeredityPathologyImmunology
"The Cell-Theory" (1853), by Thomas Henry Huxley
By: Samantha Hauserman
| Published: Dec 12, 2013
The Cell-Theory was written by Thomas Henry Huxley in Britain and published in 1853 by The British and Foreign Medico-Chirurgical Review. The twenty-…
LiteratureEpigeneticsEmbryologyHuxley, Thomas Henry, 1825-1895Cellular control mechanisms