tetrad /tet·rad/ (tet´rad) a group of four similar or related entities, as (1) any element or radical having a valence, or combining power, of four; (2) a group of four chromosomal elements formed in the pachytene stage of the first meiotic prophase; (3) a square of cells produced by division into two planes of certain cocci (Sarcina) .
tetrad
Fallot's tetrad tetralogy of Fallot.
tet·rad (t t r d )n. 1. A group or set of four. 2. A tetravalent atom, radical, or element. 3. A group of four chromatids formed from each of a pair of homologous chromosomes that split longitudinally during the prophase of meiosis. |
tetrad
[tet′rad]
Etymology: Gk, tetra, four
a group of four chromatids of a synapsed pair of homologous chromosomes during the first meiotic prophase of gametogenesis. The group is formed in preparation for the two meiotic divisions in the maturation of gametes. tetradic, adj.
tetrad
a group of four similar or related entities, as (1) any element or radical having a valence, or combining power, of four; (2) a group of four chromosomal elements formed in the pachytene stage of the first meiotic prophase; (3) a square of cells produced by division into two planes of certain cocci (sarcina).
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