| 46, XX | 46 chromosomes, 2 X chromosomes (normal female) |
|---|---|
| 46, XY | 46 chromosomes, 1 X and 1 Y chromosome (normal male) |
| DMs | Double Minute chromosomes |
|---|---|
| dmin | Double minute chromosomes |
| PCC | Prematurely condensed chromosomes |
| SMC | Structural Maintenance of Chromosomes |
| chromosomes | The self-replicating genetic structures of cells containing the cellular DNA that bears in its proteins. (09 Oct 1997) |
|---|---|
| chromosomes in multiple miscarriages | Couples who have had more than one miscarriage (spontaneous abortion) have about a 5% chance that one member of the couple is carrying a chromsome translocation responsible for the miscarriages. (12 Dec 1998) |
| 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) |
| chromosomes, fungal | Structures within the nucleus of fungal cells consisting of or containing DNA, which carry genetic information essential to the cell. (12 Dec 1998) |
| chromosomes, human | The structures within the human cell nucleus that contain the hereditary material, DNA. There are 46 chromosomes normally present in the human, including two which determine the sex of individual, xx for the female and xy for the male. Human chromosomes are classified into groups sharing structural similarity in terms of length from the centromere. (12 Dec 1998) |
| chromosomes, human, 1-3 | One of the seven groups of chromosomes containing three pairs conventionally named pairs 1, 2, and 3. The chromosomes in this group, also called group a, are large chromosomes with centromeres approximately in the middle. (12 Dec 1998) |
| chromosomes, human, 13-15 | The fourth of the seven groups of chromosomes containing three pairs conventionally named pairs 13, 14, and 15. The chromosomes in this group, also called group d, are medium sized with centromeres in the acrocentric position. (12 Dec 1998) |
| chromosomes, human, 16-18 | The fifth of the seven groups of chromosomes containing three pairs conventionally named pairs 16, 17, and 18. The chromosomes in this group, also called group e, are rather short and submetacentric. (12 Dec 1998) |
| chromosomes, human, 19-20 | The sixth of the seven groups of chromosomes containing two pairs conventionally named pairs 19 and 20. The chromosomes in this group, also called group f, are short and metacentric. (12 Dec 1998) |
| chromosomes, human, 21-22 | The seventh of the seven groups of chromosomes containing two pairs conventionally named pairs 21 and 22, and the y chromosome. The chromosomes in this group, also called the g group, are very short and acrocentric. (12 Dec 1998) |
| chromosomes, human, 4-5 | The second of the seven groups of chromosomes containing two pairs conventionally named pairs 4 and 5. The chromosomes in this group, also called group b, are large with centromeres in the submetacentric position. (12 Dec 1998) |
| chromosomes, human, 6-12 | The third of the seven groups of chromosomes containing seven pairs conventionally named pairs 6, 7, 8, 9, 10, 11, and 12, and the x chromosome. The chromosomes in this group, also called group c, are medium sized with centromeres in the submetacentric position. The x chromosome most resembles 6. This group presents the major difficulty in the identification of individual chromosomes. (12 Dec 1998) |
| chromosomes, human, pair 1 | One of the three pairs in the first group (or group a) of human chromosomes according to the current classification for humans. (12 Dec 1998) |
| chromosomes, human, pair 10 | One of the seven pairs in the third group (or group c) of human chromosomes according to the current classification for humans. (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) |
| miscarriages, multiple, chromosomes in | Couples who have had more than one miscarriage have about a 5% chance that one member of the couple is carrying a chromsome translocation responsible for the miscarriages. (12 Dec 1998) |
| segregation of chromosomes | <cell biology, genetics> The separation of pairs of homologous chromosomes that occurs at meiosis so that only one chromosome from each pair is present in any single gamete. (18 Nov 1997) |
| homologous chromosomes | A pair of chromosomes containing the same gene sequences, each derived from one parent. (12 Dec 1998) |
| sex chromosomes | The homologous chromosomes that are dissimilar in the heterogametic sex. There are the x chromosome, the y chromosome, and the w, z chromosomes (in animals in which the female is the heterogametic sex (the silkworm moth bombyx mori, for example). In such cases the w chromosome is the female-determining and the male is zz. (12 Dec 1998) |
| nonhomologous chromosomes | <genetics> Chromosome's that are not members of the same pair. (05 Mar 2000) |
| double minute chromosomes | <genetics, molecular biology> Paired, extrachromosomal elements lacking centromeres, often associated with a drug resistance gene. (05 Mar 2000) |
| duplication of chromosomes | A chromosome aberration resulting from unequal crossing over or exchange of segments between two homologous chromosomes; one chromosome of the pair loses a small segment, while the other gains this segment; the chromosome gaining the segment has undergone duplication while its homologue has undergone deletion. See: haemoglobin Lepore. (05 Mar 2000) |
| 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) |
| yeast artificial chromosomes | Yeast DNA sequences that have incorporated into them very large foreign DNA fragments; the recombinant DNA is then introduced into the yeast by transformation; the use of yeast artificial chromosomes permits the cloning of large genes with their flanking regulatory sequences. (05 Mar 2000) |
Synonyms : Chromosome
Synonyms : Archaeal Chromosome, Archaeal Chromosomes, Chromosome, Archaeal
Synonyms : Artificial Chromosome, Chromosome, Artificial
Synonyms : BAC (Chromosome), BACs (Chromosomes), Chromosomes, Bacterial Artificial, Artificial Chromosome, Bacterial, Bacterial Artificial Chromosome, Chromosome, Bacterial Artificial
Synonyms : Chromosomes, Human Artificial, HAC (Chromosome), HACs (Chromosomes), Artificial Chromosome, Human, Chromosome, Human Artificial, Human Artificial Chromosome
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