The Saccharomyces cerevisiae red1 mutant fails to assemble synaptonemal complex during meiotic prophase. This mutant displays locus-specific reductions in interchromosomal gene conversion and a moderate reduction in crossing over. The occurrence of a significant amount of meiotically induced recombination in the red1 mutant indicates that the synaptonemal complex is not absolutely required for ...

The aim of this investigation was to evaluate the semen quality traits of purebred male rabbits and their crosses under subtropical Egyptian conditions. A full 3 x 3 diallel crossing was performed for producing the first generation progeny of New Zealand White (N), Flander (F) and Rex (R) breeds. The highest ejaculate volume (p< 0.05) and percentage of live sperms (p<0.01) with the lowest perce...

Crossing-over between the dispersed repeated sequences found in eukaryotic genomes would generate chromosomal rearrangements. The stability of the yeast genome suggests the existence of some constraint on the ability of these sequences to interact by recombination. We have constructed strains with two alleles of the his3 gene located on different chromosomes. Gene conversion accounts for the ma...

How to get the target text quickly becomes a technical limitation with the using of massive data. While obtaining the Chinese target information, the segmentation of the sentence is supposed to be the key according to research. To mine the segmentation of English text is relatively simple for the space is used as a interval, meanwhile the Chinese segmentation is much more difficult. So in this ...

Homologous recombination is an important mechanism for the repair of DNA damage in mitotically dividing cells. Mitotic crossovers between homologues with heterozygous alleles can produce two homozygous daughter cells (loss of heterozygosity), whereas crossovers between repeated genes on non-homologous chromosomes can result in translocations. Using a genetic system that allows selection of daug...

K i n d s of gene rearrangement “ Crossing over” exists apparently in all those flowering plants which have been sufficiently investigated with regard to it. (By itself, it does not rearrange different genes, but only exchanges alleles.) Genetically i t consists in exchange of normally equal and homologous segments of a gene string (MORGAN 1911, STURTEVANT 1915, MULLER 1916). It has been proved...

major attributes of mitotic gene conversion in Saccharomyces have been TEai led by ROMAN (1956a) and by KAKAR ( 1961) for heteroallelic diploids, while LINDEGREN (1953) , WINGE (1955) , and PAPAZIAN and LINDEGREN (1960) have investigated instances of aberrant segregation ratios in meiosis. Heteroallelic repair, or gene conversion, is essentially non-reciprocal in character. Three lines of evide...

In this paper we study the motion of two particles diffusing on lowdimensional discrete structures in presence of a hard-core repulsive interaction. We show that the problem can be mapped in two decoupled problems of single particles diffusing on different graphs by a transformation we call diffusion graph transform. This technique is applied to study two specific cases: the narrow comb and the...

Wine yeast strains show a high level of chromosome length polymorphism. This polymorphism is mainly generated by illegitimate recombination mediated by Ty transposons or subtelomeric repeated sequences. We have found, however, that the SSU1-R allele, which confers sulfite resistance to yeast cells, is the product of a reciprocal translocation between chromosomes VIII and XVI due to unequal cros...

We derive a result on the boundedness of the multiplicity of the singular values for Hankel operator, whose symbol is of the form F (z) := ∫ dλ(t ) z − t +R(z), where λ is a complex measure with infinitely many points in its support which is contained in the interval (−1,1), and whose argument has bounded variation there, while R is a rational function with all its poles inside of the unit disk...