Recurrent hybridization without homoeologous chromosome paring in the <i>Dryopteris varia</i> complex (Dryopteridaceae)

Homoeologous chromosome pairing across the eukaryote phylogeny.

During the past quarter century, molecular phylogenetic inferences have significantly resolved evolutionary relationships spanning the eukaryotic tree of life. With improved phylogenies in hand, the focus of systematics will continue to expand from estimating species relationships toward examining the evolution of specific, fundamental traits across the eukaryotic tree. Undoubtedly, this will e...

Polarization and Weil Paring

In this talk the definition of polarization of abelian variety and Weil paring will be given. After introducing some proposition of Weil pairing, we will show the Zarhin’s trick about principal polarization.

Array-based comparative genomic hybridization analysis of recurrent chromosome 15q rearrangements.

Genomic rearrangements of chromosome 15q11-q13 cause diverse phenotypes including autism, Prader-Willi syndrome (PWS), and Angelman syndrome (AS). This region is subject to genomic imprinting and characterized by complex combinations of low copy repeat elements. Prader-Willi and Angelman syndrome are caused primarily by 15q11-13 deletions of paternal and maternal origin, respectively. Autism is...

the association between y chromosome microdeletion and recurrent pregnancy loss

The Chromosome Complex

MISS STEVENS, in a paper entitled " The Chromosomes in the Germ-Cells of Culex," gave as one of her conclusions the following : "Parasynapsis (parasyndesis) occurs in each cell generation of the germ-cells, the homologous maternal and paternal chromosomes being paired in telophase and remaining so until the metaphase of the next mitosis." Because of the importance of this discovery, especially ...