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"β-Catenin Defines Head Versus Tail Identity During Planarian Regeneration and Homeostasis" (2007), by Kyle A. Gurley, Jochen C. Rink, and Alejandro Sánchez Alvarado

By: Mary E. Sunderland | Published: Mar 15, 2010

Alejandro Sánchez Alvarado's laboratory group has employed molecular tools to investigate old questions about regeneration and as a result have…

RegenerationExperiments

Chemical Induction

By: Adam R. Navis | Published: Oct 30, 2007

Research in chemical induction seeks to identify the compound or compounds responsible for differentiation in a developing embryo. Soren Lovtrup…

Cell differentiationEmbryosDevelopmental BiologyNotochordWaddington, C. H. (Conrad Hal), 1905-1975
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“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

Alec John Jeffreys (1950–)

By: Corey Harbison | Published: Jun 15, 2017

Alec John Jeffreys created a process called DNA fingerprinting in the UK during the twentieth century. For DNA fingerprinting, technicians identify a…

DNA fingerprintingForensic sciencesForensic AnthropologyMicrosatellites (Genetics)Exons (Genetics)

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

The Hedgehog Signaling Pathway in Vertebrates 

By: Dorothy Regan Haskett | Published: Jun 27, 2016

The hedgehog signaling pathway is a mechanism that regulates cell growth and differentiation during embryonic development, called embryogenesis, in…

Drosophila melanogasterCyclopiaGenetic regulationZebra danioGenes

"Interspecific Chimeras in Mammals: Successful Production of Live Chimeras Between Mus musculus and Mus caroli" (1980), by Janet Rossant and William I. Frels

By: Nicole Newkirk | Published: Oct 30, 2007

In 1980 Janet Rossant and William I. Frels published their paper, "Interspecific Chimeras in Mammals: Successful Production of Live Chimeras Between…

ChimeraExperimentsMice

Anencephaly

By: Jesse King | Published: Feb 13, 2013

Anencephaly is an open neural tube defect, meaning that part of the neural tube does not properly close or that it has reopened during early…

fetal developmentFetus--AbnormalitiesBirth DefectsEmbryologyPregnancy

"CRISPR /Cas9-mediated Gene Editing in Human Tripronuclear Zygotes" (2015), by Junjiu Huang et al.

By: Meilin Zhu | Published: Nov 08, 2017

In 2015, Junjiu Huang and his colleagues reported their attempt to enable CRISPR/cas 9-mediated gene editing in nonviable human zygotes for the first…

LiteratureDoudna, Jennifer A.Charpentier, Emmanuelle, 1968-Clustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Cas Systems

“Use of reproductive technology for sex selection for nonmedical reasons” (2015), by the Ethics Committee of the American Society for Reproductive Medicine

By: Alysse Blight | Published: May 27, 2019

In June 2015, the Ethics Committee of the American Society for Reproductive Medicine, or ASRM, published “Use of reproductive technology for sex…

LiteratureSex PreselectionFertilization in VitroReproductive technologyHuman reproductive technology