| genetic human male | An individual with a karyotype containing a Y chromosome, an individual whose cell nuclei do not contain Barr sex chromatin bodies, which are normally present in females. Patients with ambiguous sexual development and those with Turner's syndrome are classed as genetic male's or genetic females according to the absence or presence of Barr bodies even though their sex chromosome complement may suggest otherwise. (05 Mar 2000) |
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| genome, human | All of the genetic information, the entire genetic complement, all of the DNA in a person. Humanity's DNA is the treasury of human inheritance. It is this extraordinary repository of genetic information which the Human Genome Project in the United States and comparable programs in other countries around the world that belong to HUGO (the HUman Genome Organisation) are designed to fully fathom. (12 Dec 1998) |
| parts of human body | The head, neck, trunk, and limbs. Synonym: partes corporis humani. (05 Mar 2000) |
| parvovirus b19, human | The sole species of erythrovirus and the aetiological agent of erythema infectiosum, a disease most commonly seen in school-age children. (12 Dec 1998) |
| gonadotropin, human chorionic | A human hormone made by chorionic cells (in the foetal part of the placenta), hCG is directed at the gonads and stimulates them. HCG becomes detectable (by immunologic means) within days of fertilization and forms the foundation of the common pregnancy tests. The level of hCG in maternal serum also enters as one component in the double and the triple screens used during pregnancy to assign risks of Down syndrome and other foetal disorders. (12 Dec 1998) |
| chorionic gonadotropin, beta subunit, human | The beta subunit of human chorionic gonadotropin. It is used as a clinical marker to facilitate early detection of normal pregnancy and significantly contributes to the diagnosis of various pregnancy-related disorders, such as ectopic pregnancy, spontaneous abortion, hydatidiform mole, choriocarcinoma, or trisomy 21. Further, determination of this marker is immensely helpful to guide curative intervention in testicular cancer. Other possible clinical uses includes as a marker of cancers of the bladder, pancreas, or biliary tract. (scan j clin lab invest suppl 1993;216:97-104) (12 Dec 1998) |
| chorionic gonadotropin, human | A human hormone made by chorionic cells (in the foetal part of the placenta), hCG is directed at the gonads and stimulates them. HCG becomes detectable (by immunologic means) within days of fertilization and forms the foundation of the common pregnancy tests. The level of hCG in maternal serum also enters as one component in the double and the triple screens used during pregnancy to assign risks of Down syndrome and other foetal disorders. (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) |