The tetrad is the four spores of a yeast, that separate after mating. If the two parents have a mutation in two different genes, the tetrad can segregate as the parental ditype, the non-parental ditype or as the tetratype.... , the four spores of a yeast
Tetrad (Greek philosophy), the first number formed by the addition and multiplication of equals
In Riemannian geometry, we can introduce a coordinate system over the Riemannian manifold , giving n coordinatesfor an n-dimensional manifold. Locally, at least, this gives a basis for the 1-forms, dxi where d is the exterior derivative.... , a concept in differential geometry
In music theory, a tetrad is a set of four notes. When these four notes form a tertian chord they are more particularly and more commonly referred to as a seventh chord, after the diatonic interval from the root of the chord to its fourth note .... , a set of four notes
A tetrad is an area 2 km x 2 km square. The term has a particular use in connection with the British Ordnance Survey British national grid reference system, and then refers to any of the 25 such squares which make up a standard hectad .... , an area 2km x 2km square
A tetromino, also spelled tetramino or tetrimino, is a geometric shape composed of four square s, connected orthogonality. This is a particular type of polyomino, like dominoes and pentominoes are.... , a shape composed of four squares
Generally speaking, a tetrad is any set of four things. In Laws of Media and The Global Village , published posthumously, Marshall McLuhan summarized his ideas about media studies in a concise tetrad of media effects.... , a pedagogical tool
