| 2n | haploid chromosome; diploid |
|---|---|
| Ang GR | angiotensin generation rate |
| F1, | F2 etc. first, second, etc., filial generation |
| GEN | gender; generation |
| GT | gait training; galactosyl transferase; gastrostomy; generation time; genetic therapy; gingiva treatm... |
| DH | double haploid |
|---|---|
| AGT | Average generation time |
| F1 | First generation |
| HG-AAS | Hydride-generation atomic absorption spectrometry |
| SHG | Second harmonic generation |
| haploid | <cell biology, genetics> Describes a nucleus, cell or organism possessing a single set of unpaired chromosomes. Gametes are haploid. (18 Nov 1997) |
|---|---|
| haploid number | <cell biology, genetics> The haploid number is the total number of chromosomes in a single set, such as would be found in a gamete or a haploid somatic cell (such as in fungus or gametophyte plants). In humans, the haploid number would be 23. (09 Oct 1997) |
| haploid set | The genetic content of a normal gamete in which every autosomal locus is represented by a single allele and either one full set of X-linked genes or one full set of Y-linked genes; the normal adult somatic cell contains two diploid set. (05 Mar 2000) |
| antidepressive agents, second-generation | A structurally and mechanistically diverse group of drugs that are not tricyclics or monoamine oxidase inhibitors. The most clinically important appear to act selectively on serotonergic systems, especially by inhibiting serotonin reuptake. (12 Dec 1998) |
| asexual generation | Reproduction by fission, gemmation, or in any other way without union of the male and female cell, or conjugation. See: parthenogenesis. Synonym: heterogenesis, nonsexual generation. (05 Mar 2000) |
| generation | 1. The act of generating or begetting; procreation, as of animals. 2. Origination by some process, mathematical, chemical, or vital; production; formation; as, the generation of sounds, of gases, of curves, etc. 3. That which is generated or brought forth; progeny; offspiring. 4. A single step or stage in the succession of natural descent; a rank or remove in genealogy. Hence: The body of those who are of the same genealogical rank or remove from an ancestor; the mass of beings living at one period; also, the average lifetime of man, or the ordinary period of time at which one rank follows another, or father is succeeded by child, usually assumed to be one third of a century; an age. "This is the book of the generations of Adam." (Gen. V. 1) "Ye shall remain there [in Babylon] many years, and for a long season, namely, seven generations." (Baruch vi. 3) "All generations and ages of the Christian church." (Hooker) 5. Race; kind; family; breed; stock. "Thy mother's of my generation; what's she, if I be a dog?" (Shak) 6. <geometry> The formation or production of any geometrical magnitude, as a line, a surface, a solid, by the motion, in accordance with a mathematical law, of a point or a magnitude; as, the generation of a line or curve by the motion of a point, of a surface by a line, a sphere by a semicircle, etc. 7. <biology> The aggregate of the functions and phenomene which attend reproduction. There are four modes of generation in the animal kingdom: scissiparity or by fissiparous generation, gemmiparity or by budding, germiparity or by germs, and oviparity or by ova. <biology> Alternate generation, the fancied production of living organisms without previously existing parents from inorganic matter, or from decomposing organic matter, a notion which at one time had many supporters; abiogenesis. Origin: OE. Generacioun, F. Generation, fr.L. Generatio. Source: Websters Dictionary (01 Mar 1998) |
| generation effect | Variation in health status arising from the different causal factors of disease to which each successive generation born is exposed as it passes through life. (05 Mar 2000) |
| generation time | <cell biology> Time taken for a cell population to double in numbers and thus equivalent to the average length of the cell cycle. (18 Nov 1997) |
| parental generation | The parents of a mating, commonly experimental, involving contrasting genotypes; the original mating of a genetic experiment; parents of the F1 generation. (05 Mar 2000) |
| virgin generation | <biology> Development of an ovum without fusion of its nucleus with a male pronucleus to form a zygote. (18 Nov 1997) |
| sexual generation | Reproduction by conjugation, or the union of male and female cells, as opposed to asexual generation. (05 Mar 2000) |
| skipped generation | A phenomenon of pedigrees in which a gene is transmitted from one affected person to another through a phenotypically unaffected person, as by recessivity (especially for X-linked traits), epistasis, variable expressivity, or absence of an environmental challenge such as a toxin. Except at a crass phenotypic level (e.g., clinical or commercial) this term becomes progressively less useful as the mechanisms are elucidated. (05 Mar 2000) |
| spontaneous generation | The obsolete hypothesis that living organisms can originate from nonliving matter. (09 Oct 1997) |
| nonsexual generation | Reproduction by fission, gemmation, or in any other way without union of the male and female cell, or conjugation. See: parthenogenesis. Synonym: heterogenesis, nonsexual generation. (05 Mar 2000) |
| f-1 generation | <genetics> Filial-One generation. The first generation of offspring which results after mating or genetically crossing two types of parents with different genotypes or phenotypes. (The parents are known as the P generation.) (09 Oct 1997) |
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