genetics |
english |
Difino
| • | Genetics (from the Greek genno γεννώ= give birth) is the science of genes, heredity, and the variation of organisms. The word genetics was first applied to describe the study of inheritance and the science of variation by English scientist William Bateson in a letter to Adam Sedgwick, dated April 18, 1905. Humans began applying knowledge of genetics in prehistory with the domestication and breeding of plants and animals. In modern research, genetics provides important tools for the investigation of the function of a particular gene, e.g., analysis of genetic interactions. Within organisms, genetic information generally is carried in chromosomes, where it is represented in the chemical structure of particular DNA molecules. Genes encode the information necessary for synthesizing the amino-acid sequences in proteins, which in turn play a large role in determining the final phenotype of the organism. In diploid organisms, a dominant allele on one chromosome will mask the expression of a recessive gene on the other.The phrase to code for is often used to mean a gene contains the instructions about how to build a particular protein, as in the gene codes for the protein.The "one gene, one protein" concept is now known to be simplistic. For example, a single gene may produce multiple products, depending on how its transcription is regulated. Genes code for the nucleotide sequences in mRNA, tRNA and rRNA, required for protein synthesis. Genetics determines much (but not all) of the appearance of organisms, including humans, and possibly how they act. Environmental differences and random factors also play a part. Monozygotic ("identical") twins, a clone resulting from the early splitting of an embryo, have the same DNA, but different perso Source: [wikipedia: genetics] |
by_topic:researchers
| DNA Heritage | ||
| a commercial laboratory specializing in y-chromosome testing for genealogists. us office in rochester, new york, and uk office in weymouth, dorset. | ||
| Family Tree DNA | ||
| establishing dna fingerprints for the purpose of determining ancestral pedigrees. testing is available to both amateur and professional genealogists. headquarters in houston, texas. | ||
| Geo Gene | ||
| using dna obtained through a simple mouth swab to trace lineages back more than 100,000 years. offices in the us and uk. | ||
| Oxford Ancestors | ||
| a venture backed by oxford university to harness the power and precision of modern genetics in the service of genealogy. | ||
| Relative Genetics | ||
| genetic genealogy applies dna testing to paper-based, genealogical research. a business unit of sorenson genomics, located in salt lake city, utah. | ||
alebrije.info : alebrijes : sites : advertising : link to us : contact
• Fuzzy search
books
genetic
genetic disorders
genetic programming
geneticists and biochemists
genetics research organizations
genetics-related topics
genomics
• Specialized stores
Amazon.com (US)
Amazon.ca (CA)
Amazon.co.uk (UK)
• Specialized search
Discovery.com
Exploratorium
TutorialFind
• General crawlers
All the Web
AltaVista
Google
Lycos
Mamma
Msn
Overture
Teoma
WiseNut