| 46, XX | 46 chromosomes, 2 X chromosomes (normal female) |
|---|---|
| 46, XY | 46 chromosomes, 1 X and 1 Y chromosome (normal male) |
| RIP | Respiratory Inversion Point |
| FIGE | field inversion gel electrophoresis |
| FLAIR | fluid attenuated inversion recovery |
| STIR | Inversion Time Inversion Recovery |
|---|---|
| STIR | Short-inversion time inversion-recovery |
| DMs | Double Minute chromosomes |
| dmin | Double minute chromosomes |
| PCC | Prematurely condensed chromosomes |
| inversion of chromosomes | A chromosome aberration resulting from a double break in a segment of the chromosome, with end for end rotation of the fragment between the fracture lines, and refusion of the fragments; this results in reversal of the order of genes in that segment. (05 Mar 2000) |
|---|
| paracentric inversion | A basic type of chromosome rearrangement. A segment that does not include the centromere (and so is paracentric) has been snipped out of a chromosome, turned through 180 degrees (inverted), and inserted right back into its original location in chromosome. (12 Dec 1998) |
|---|---|
| visceral inversion | A transposition of the viscera, e.g., the liver developing on the left side or the heart on the right. Synonym: visceral inversion. (05 Mar 2000) |
| pericentric inversion | <cell biology, genetics> Chromosomal inversion in which the region that is inverted includes the kinetochore. (18 Nov 1997) |
| short TI inversion recovery | An inversion recovery sequence that uses a short inversion time, about 100 ms., between 180 |
| inversion | 1. The act of inverting, or turning over or backward, or the state of being inverted. 2. <mathematics> A change in the order of the terms of a proportion, so that the second takes the place of the first, and the fourth of the third. 3. <genetics> An aberration in which a chromosomal segment is deleted and reinserted in the same place but turned 180 degrees from its original orientation, so that the gene sequence for the segment is reversed with respect to that of the rest of the chromosome. 4. <geometry> A peculiar method of transformation, in which a figure is replaced by its inverse figure. Propositions that are true for the original figure thus furnish new propositions that are true in the inverse figure. See Inverse figures, under Inverse. 5. Said of intervals, when the lower tone is placed an octave higher, so that fifths become fourths, thirds sixths, etc. Said of a chord, when one of its notes, other than its root, is made the bass. 6. <geology> The folding back of strata upon themselves, as by upheaval, in such a manner that the order of succession appears to be reversed. 7. <chemistry> The act or process by which cane sugar (sucrose), under the action of heat and acids or ferments (as diastase), is broken or split up into grape sugar (dextrose), and fruit sugar (levulose); also, less properly, the process by which starch is converted into grape sugar (dextrose). The terms invert and inversion, in this sense, owe their meaning to the fact that the plane of polarization of light, which is rotated to the right by cane sugar, is turned toward the left by levulose. See: invert. Origin: L. Inversio: cf. F. Inversion. Source: Websters Dictionary (04 Jul 1999) |
| inversion heterozygote | <genetics> Individual in which one chromosome contains an inversion whereas the homologous chromosome does not. (18 Nov 1997) |
| inversion of the uterus | A turning of the uterus inside out, usually following childbirth. (05 Mar 2000) |
| inversion recovery | A magnetic resonance pulse sequence in which a series of 180 |
| uterine inversion | A turning of the uterus inside out, whereby the fundus is forced through the cervix and protrudes into or outside of the vagina. (12 Dec 1998) |
| banding of chromosomes | Treatment of chromosomes to reveal characteristic patterns of horizontal bands. Thanks to these banding patterns that resemble bar codes, each human chromosome is distinctive and can be identified without ambiguity. (12 Dec 1998) |
| reduction of chromosomes | The process during meiosis whereby one member of each homologous pair of chromosomes is distributed to a sperm or ovum; the diploid set of chromosomes (46 in humans) is thus reduced to the haploid set in each gamete; union of the sperm and ovum then restores the diploid or somatic number in the one-cell zygote. (05 Mar 2000) |
| ring chromosomes | Aberrant chromosomes with no ends. (12 Dec 1998) |
| chromosomes | The self-replicating genetic structures of cells containing the cellular DNA that bears in its proteins. (09 Oct 1997) |
| chromosomes, archaeal | Structures within the nucleus of archaeal cells consisting of or containing DNA, which carry genetic information essential to the cell. (12 Dec 1998) |
| chromosomes, bacterial | Structures within the nucleus of bacterial cells consisting of or containing DNA, which carry genetic information essential to the cell. (12 Dec 1998) |
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