Understanding Genetics: Human Health and the Genome Try your luck at DNA Roulette. Watch out, you might even learn something...Learn More See whether online genetic tests are right for youLearn More When Will Broccoli Taste Like Chocolate? Talking Glossary of Genetic Terms Glossary Home | Text Version Designed to help learners at any level better understand genetic terms Guided by national science standards Explained by scientists at the NIH The National Human Genome Research Institute (NHGRI) created the Talking Glossary of Genetic Terms to help everyone understand the terms and concepts used in genetic research. In addition to definitions, specialists in the field of genetics share their descriptions of terms, and many terms include images, animation and links to related terms. Enter a search term or explore the list of terms by selecting a letter from the alphabet on the left and then select from the terms revealed. The Talking Glossary At the bottom of most pages in the Talking Glossary are links to help you get the most out of this glossary.
3. La química de la herencia ... y la genética molecular. por Teodora Zamudio “¿Y si tiene mi apariencia física y tu cerebro?” Bernard Shaw a Isadora Duncan En la actualidad, la biología molecular suministra un amplio caudal de conocimiento acerca de los genes. La historia de la genética se desarrolló bajo la guía de estas preguntas, preguntas que sólo cobrarían sentido desde una interpretación realista del discurso científico. 3.1 El ADN nuclear. 3.1.1 La replicación del ADN. 3.1.2 La trascripción y la traducción del ADN. 3.2 Otras organizaciones y expresiones génicas. 3.2.1 El ADN mitocondrial. 3.2.2 El ADN adicional de las bacterias: los plásmidos. 3.1 El ADN nuclear. Los cromosomas, al igual que todas las partes de una célula viva, están compuestos por átomos ordenados en moléculas. 1. lleva la información genética de célula madre a célula hija, y de generación en generación; además, esta información es transmitida en grandes cantidades. Gráfico 1 Conformación de la doble cadena de ADN. 3.1.1 La replicación del ADN.
DNA From The Beginning Cracking the Code of Life Cracking the Code of Life PBS Airdate: April 17, 2001 ROBERT KRULWICH: When I look at this—and these are the three billion chemical letters, instructions for a human being—my eyes glaze over. But when scientist Eric Lander looks at this he sees stories. ERIC LANDER (Whitehead Institute/MIT): The genome is a storybook that's been edited for a couple billion years. ROBERT KRULWICH: This is the story of one of the greatest scientific adventures ever, and at the heart of it is a small, very powerful molecule, DNA. For the past ten years, scientists all over the world have been painstakingly trying to read the tiny instructions buried inside our DNA. J. FRANCIS COLLINS (National Human Genome Research Institute): This is the ultimate imaginable thing that one could do scientifically...is to go and look at our own instruction book and then try to figure out what it's telling us. ROBERT KRULWICH: And what it's telling us is so surprising and so strange and so unexpected. I'm Robert Krulwich. DR.
Los archivos completos de Eintein, en la red La Universidad Hebrea de Jerusalén ha comenzado a publicar en Internet todos los manuscritos personales y científicos de Albert Einstein. Miles de documentos donde descubrir al Premio Nobel de Física y al hombre que había detrás: desde su teoría de la relatividad escrita a mano a las cartas de amor prohibidas. (Fuente: Euronews) Copyright © 1996-2015 Amazings® / NCYT® | (Noticiasdelaciencia.com / Amazings.com). Todos los derechos reservados. Depósito Legal B-47398-2009, ISSN 2013-6714 - Amazings y NCYT son marcas registradas. Genetics and the tree of life We traditionally think about the tree of life in terms of Kingdoms: plants, animals, fungi, bacteria, etc. Genetics has really revolutionized the way we think about the tree of life and, because our classifications should reflect ancestry (that is, who is more closely related to whom), it has actually called into question a lot of our traditional classifications. Most biologists split up life into three domains: Archaea, Bacteria, and Eucarya (the last of which includes animals, plants, fungi, etc.). The three domains of life. From Carl Zimmer's blog The Loom. Science writer Carl Zimmer has an interesting post on his blog about how the newest genetic data may even call this classification into question by adding a fourth domain. There’s a lot of debate about whether eukaryotes actually split off from within the archaea, or just branched off from a common ancestor. New research is looking at tons of genes from these sorts of organisms. References Wu, D., et al. (2011). Like this:
Genetic Updata Conferences | SamRhine.com Scientix blog The Illustrated Guide to Epigenetics Illustrations by Joe Kloc This month marks the ten-year anniversary of the sequencing of the human genome, that noble achievement underpinning the less noble sales of 23andMe's direct-to-consumer genetic tests. To commemorate the scientific occasion, we've created an illustrated introduction to one subfield of genetics likely to produce even more dubious novelty science projects someday: epigenetics. What is epigenetics? FIGURE 1: Through a process called mitosis, a single cell (A) splits into two cells (B) with identical genetic information. FIGURE 2: DNA coils around proteins called histones, forming a nucleosome. How does the epigenome work? Molecular "caps" called methyl groups can be attached to genes in order to effectively block them from giving instructions to the cell (FIGURE 3). FIGURE 3: Methyl groups attach themselves to base pairs of a gene, changing the way the gene is expressed.In these two ways the epigenome controls which genes ultimately get expressed.
MYCN v-myc myelocytomatosis viral related oncogene, neuroblastoma derived (avian) [Homo sapiens] - Gene result Gene Physical definitions RNA genes and genomes in the world When proteins are manufactured, the gene is first copied into RNA as an intermediate product. In other cases, the RNA molecules are the actual functional products. Functional structure of a gene The vast majority of living organisms encode their genes in long strands of DNA (deoxyribonucleic acid). Due to the chemical composition of the pentose residues of the bases, DNA strands have directionality. Many prokaryotic genes are organized into operons, or groups of genes whose products have related functions and which are transcribed as a unit. Chromosomes Whereas the chromosomes of prokaryotes are relatively gene-dense, those of eukaryotes often contain so-called "junk DNA", or regions of DNA that serve no obvious function. Gene expression Genetic code Schematic diagram of a single-stranded RNA molecule illustrating the position of three-base codons. Transcription
Exploring Genomics Data The Genomics Explorers provide an iterative way for students to choose strategies for asking and addressing biologically interesting questions using a range of genomics tools. Select which Explorer you wish to explore: The Genomics Explorer helps students: become inspired about biology develop a literature-based understanding of important quantitative approaches, define interesting questions that can be addressed with data, make connections between genes and their biological functions, analyze and critically evaluate bioinformatic data, connect bioinformatic analyses with wet lab and field experiments, develop and test a viable hypothesis by bringing together the literature, classroom knowledge, and analysis of data. Supported by National Science Foundation grants DEB 0746571 and DUE 0837375, Teagle Foundation Fresh Thinking Grant, Vassar College, and Cofactor Genomics .