Nevii pigmentari sau aluniţele

In mare parte aparitia alunitelor este programata genetic. Singurul factor asupra caruia putem interveni ar fi cantitatea de UV, care ajunge la nivelul pielii. Acest lucru nu inseamna ca nu trebuie sa mai stam la soare, ci doar sa respectem anumite reguli: nu va expuneti la soare intre orele 10.30- 17.00 folositi pe parcursul verii…

O DESCOPERIRE REVOLUTIONARA a medicilor romani de la Fundeni a ajuns in prestigioasa revista „Nature”

O echipă de medici de la Institutul Fundeni, în colaborare cu cercetători de la Universitatea din Singapore au făcut o descoperire care va revoluţiona metodele de diagnostic şi tratamentul cancerului la ficat. Reuşita lor se regăseşte în numărul de noiembrie al prestigioasei reviste „Nature Genetics”. Irinel Popescu, preşedintele Academiei de Ştiinţe Medicale, a anunţat astăzi…

Libertate şi condiţionare genetică în persoana umană

Diac. dr. Adrian Sorin Mihalache     Duminică, 27 octombrie 2013 În cuprinsul vieţii spirituale ve­dem, în toată splendoarea, pu­terea omului duhovnicesc asupra slăbiciunilor firii, asu­pra lumii căzute şi a ispitelor ei. Prin viaţa lor, sfinţii şi martirii, cuvioşii şi asceţii dau mărturie, peste veacuri, de puterea pe care orice om cu viaţă înduhovnicită o poate…

Study reveals why the body clock is slow to adjust to time changes

New research in mice reveals why the body is so slow to recover from jet-lag and identifies a target for the development of drugs that could help us to adjust faster to changes in time zone. With funding from the Wellcome Trust and F. Hoffmann La Roche, researchers at the University of Oxford, University of…

Genes (part one)

Genes Dr Dragotoiu, UMF-CD Bucharest – click here (English) A very good version to make you understand… pictures included 😉

X Chromosome: X Inactivation

By: Janice Y. Ahn (Harvard Medical School) & J. T. Lee, Ph.D. (Department of Genetics, Harvard Medical School) © 2008 Nature Education Females (XX) carry twice as many X-linked genes on their sex chromosomes as males (XY). How do cells control gene expression to manage this potentially lethal dosage problem? Figure 1: Tortoiseshell cat. The patchy distribution of color on tortoiseshell cats results from…

The Genetic Code

The Genetic Code Index The RNA Codons The DNA Codons Codon Bias Exceptions to the Code The genetic code consists of 64 triplets of nucleotides. These triplets are called codons.With three exceptions, each codon encodes for one of the 20 amino acids used in the synthesis of proteins. That produces some redundancy in the code:…

Transposons: The Jumping Genes

By: Leslie A. Pray, Ph.D. © 2008 Nature Education Transposable elements, or “jumping genes”, were first identified by Barbara McClintock more than 50 years ago. Why are transposons so common in eukaryotes, and exactly what do they do? Transposable elements (TEs), also known as “jumping genes,” are DNA sequences that move from one location on the genome to another….

Genetic Linkage in Humans

HUMAN GENETICS for 1st YEAR STUDENTS LINKAGE AND MAPPING INTRODUCTION When the loci of two genes are on the same chromosome, they are said to be syntenic. When they are on the same chromosome, and are close enough together that they do not segregate independently, they are said to be linked. Linkage is a powerful…

Discovery and Types of Genetic Linkage

By: Ingrid Lobo, Ph.D. (Write Science Right) & Kenna Shaw, Ph.D. (Executive Editor, Nature Education) © 2008 Nature Education   Soon after the rediscovery of Mendel’s work, several scientists noted traits in their crosses seemed “coupled.” But this deviated from Mendel’s principles, so how did they explain this? Although Gregor Mendel developed his groundbreaking principles of inheritance in the mid-1800s, the importance of…