nitrogenous bases

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• Nitrogenous base — …   Wikipedia

• Nitrogenous base — A molecule that contains nitrogen and has the chemical properties of a base. The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C). The nitrogenous bases in RNA are the same with one exception: adenine (A),… …   Medical dictionary

• Nucleoside — Nitrogenous base Nucleoside Deoxynucleoside Adenine Adenosine A …   Wikipedia

• heredity — /heuh red i tee/, n., pl. heredities. Biol. 1. the transmission of genetic characters from parents to offspring: it is dependent upon the segregation and recombination of genes during meiosis and fertilization and results in the genesis of a new… …   Universalium

• bacteria — bacterial, adj. bacterially, adv. /bak tear ee euh/, n.pl., sing. bacterium / tear ee euhm/. ubiquitous one celled organisms, spherical, spiral, or rod shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom …   Universalium

• gene — /jeen/, n. the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary… …   Universalium

• Gene — /jeen/, n. a male given name, form of Eugene. * * * I Unit of heredity that occupies a fixed position on a chromosome. Genes achieve their effects by directing protein synthesis. They are composed of DNA, except in some viruses that contain RNA… …   Universalium

• DNA — Genetics. deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each… …   Universalium

• uracil — /yoor euh sil/, n. Biochem. a pyrimidine base, C4H4N2O2, that is one of the fundamental components of RNA, in which it forms base pairs with adenine. Symbol: U [1905 10; UR 1 + AC(ETIC) + il, of uncert. orig.] * * * Organic compound of the… …   Universalium

• RNA — Genetics. ribonucleic acid: any of a class of single stranded molecules transcribed from DNA in the cell nucleus or in the mitochondrion or chloroplast, containing along the strand a linear sequence of nucleotide bases that is complementary to… …   Universalium

• Modern Evolution of Genetics Timeline — This is a timeline of events concerning the Modern Evolution of Genetics, from Gregor Mendel to present day. Contents 1 1800s 2 1900s 3 1910s 4 1920s …   Wikipedia