Drosophila melanogaster 125I-5S RNA was annealed to salivary gland preparations of 6 species in the virilis group of Drosophila. Two patterns of annealing were found. D. virilis, D. montana and D. borealis showed three 5S gene clusters on chromosome 5; Sd-f and Wc-j were strongly labeled, but Xa-e was weakly labeled. D. montana and D. borealis have a greater percentage of their total 5S cistrom...

In this paper, we consider orthogonal stability of mixed type additive and cubic functional equation of the form $$f(2x+y)+f(2x-y)-f(4x)=2f (x+y)+2f(x-y)-8f(2x) +10f(x)-2f(-x),$$ with $xbot y$, where $bot$  is orthogonality in the sense of Ratz.

The mating type of Escherichia coli is determined by the presence or absence of the sex factor (F). Cells which lack F are genetic recipients or females, and are designated F-; cells which possess F may be genetic donors, or males (Lederberg et al., 1952). Two types of males have been described: F+, in which the sex factor behaves as though it were a population of autonomous, extrachromosomal p...

conclusions albumin gradient method is the enrichment of y-bearing chromosome sperms. separation of spermatozoa by albumin gradient method, introduced by ericsson, is a suitable method for sex selection of male offspring. this technique is safe, because it neither requires toxic materials during sperm separation, nor involves embryo manipulation. objectives the study aimed to assess the separat...

Here, we review recent progress that yields fundamental new insight into the molecular mechanisms behind plasmid and chromosome segregation in prokaryotic cells. In particular, we describe how prokaryotic actin homologs form mitotic machineries that segregate DNA before cell division. Thus, the ParM protein of plasmid R1 forms F actin-like filaments that separate and move plasmid DNA from mid-c...

Abstract Aim Good practice set out by the GMC and DoH is to acquire written informed consent for surgery, despite it not being a legal requirement. Baseline data of 50 consecutive surgical cases, undertaken in UK’s largest trust, found that only 12% patients were offered their form copy prior surgery. We constructed SMART aim increase this percentage 20% each month on general wards city hospita...

Among autosome abnormalities, those involving group-F (19-20) chromosomes are seldom encountered. Even in abortuses where chromosome defects, namely trisomies, are more frequent than in live births, Carr (1969) stated that group-F chromosomes anomalies are relatively rare. The previous cytogenetic studies involving group-F autosomes concerned only patients with haematological diseases. Borges, ...