karyotypes of eleven iranian populations of trigonella foenum-graceum were investigated. somatic chromosome numbers of examined populations were determined as 2n = 14. chromosomal parameters were examined as follows: long arm length (tl), short arm, total chromosome length, arm ratio, r-value, form percentage of chromosome, total form percentage of karyotype. chromosomes were mostly metacentric...

the polygene chromosomal pattern together with the somatic and meiotic chromosomes of the autogenous tehran strain of culex pipiens molestus is described. the first and third chromosomes are metacentric, the second one is slightly submetacentric. each chromosome has well-defined, large puffed char­acteristic centromeres. randomly distributed asynaptic regions on the polytens chromosomes are ind...

Indigofera santapaui Sanjappa is little-known species and reported from very few localities of the north Western Ghats. In present investigation, somatic chromosome number (2n=16) karyotype analysis were for first time in I. santapaui. The formula was observed to be 2n=16=12m+4sm. Karyotype fell 2B asymmetric category Stebbins’ classification.

Ploidy: the number of copies of each chromosome that is contained in somatic (non-gamete) cells of a species. In humans and most other animal species, the somatic cells are usually diploid, meaning they have 2 copies of each chromosome, whereas the gamete cells are haploid and have a single copy of each chromosome. Some plant and animal species are known to have more than 2 copies of each chrom...

Methylthioadenosine phosphorylase (MTAP) is an enzyme that functions in a salvage pathway for adenine synthesis. The locus that encodes MTAP activity has been mapped to human chromosome 9 (9q12-9pter) by analysis of mouse x human somatic cell hybrids. Cells that have MTAP activity will stop proliferating, and eventually die in the presence of azaserine, an inhibitor of de novo purine synthesis,...

The properties of embryonic hybrid cells obtained by fusion of embryonic stem (ES) or teratocarcinoma (TC) cells with differentiated cells are reviewed. Usually, ES-somatic or TC-somatic hybrids retain pluripotent capacity at high levels quite comparable or nearly identical with those of the pluripotent partner. When cultured in vitro, ES-somatic- and TC-somatic hybrid cell clones, as a rule, l...

Different ploidy levels, diploid (2n=2x=24) to hexaploid (2n=6x=72) have been reported for Acorus calamus, a perennial medicinal plant. According to available information, there is a significant relationship between the ploidy level and essential oil compositions and medicinal properties of this important genetic resource. However, there is no information about the chromosome number of A. calam...