| Finney, John | <person> U.S. Surgeon, 1863-1942. See: Finney's operation, Finney pyloroplasty. (05 Mar 2000) |
|---|---|
| Fordyce, John | <person> U.S. Dermatologist, 1858-1925. See: Fordyce's angiokeratoma, Fordyce's disease, Fordyce's granules, Fordyce's spots, Fox-Fordyce disease. (05 Mar 2000) |
| Forssman, John | <person> Swedish bacteriologist and pathologist, 1868-1947. See: Forssman antibody, Forssman antigen, Forssman reaction, Forssman antigen-antibody reaction. (05 Mar 2000) |
| Fothergill, John | <person> English physician, 1712-1780. See: Fothergill's disease, Fothergill's neuralgia, Fothergill's sign. (05 Mar 2000) |
| Lilly, John | <person> U.S. Physiologist, *1915. See: Silverman-Lilly pneumotachograph. (05 Mar 2000) |
| Lloyd, John Uri | <person> U.S. Pharmacist, 1849-1936. Noted for investigational work in plant chemistry and phytochemistry as applied to medicines, alkaloids, and glucosides. (05 Mar 2000) |
| Long, John | <person> U.S. Physician, 1856-1927. See: Long's coefficient, Long's formula. (05 Mar 2000) |
| Luft, John | <person> U.S. Histologist, *1927. See: Luft's potassium permanganate fixative. (05 Mar 2000) |
| accessory chromosome | A chromosome existing without its normal homologous chromosome; at the reduction division of gametogenesis an accessory chromosome is likely to be included in one daughter cell and not in the other, but may be lost completely by lagging behind on the equatorial plate. Synonym: monosome, odd chromosome, unpaired allosome, unpaired chromosome. (05 Mar 2000) |
| acentric chromosome | A fragment of a chromosome lacking a centromere and unable to attach to the mitotic spindle, therefore unable to take part in the division of a nucleus and randomly distributed in daughter cells. Synonym: acentric fragment. (05 Mar 2000) |
| acrocentric chromosome | A chromosome with the centromere placed very close to one end so that the short arm is very small, often with a satellite. (05 Mar 2000) |
| balanced chromosome | <genetics> A chromosome which is unable to pair with its homologue and participate in homologus recombination during meiosis because it contains several inversion mutations (that is, has segments which have become flip-flopped). (09 Oct 1997) |
| B chromosome | <genetics> Small acentric chromosome, part of the normal genome of some races and species of plants. (18 Nov 1997) |
| bivalent chromosome | A pair of chromosome's temporarily united. (05 Mar 2000) |
| male chromosome complement | The large majority of males have a 46, xy chromosome complement (46 chromosomes including an x and a y chromosome). A minority of males have other chromosome constitutions such as 47,xxy (47 chromosomes including two x chromosomes and a y chromosome) and 47,xyy (47 chromosomes including an x and two y chromosomes). (12 Dec 1998) |