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Recombination Map of the Common Shrew, Sorex araneus (Eulipotyphla, Mammalia)
TLDR
A high-precision cytological recombination map for the Eurasian common shrew is generated, the third such map produced in mammals, following those for humans and house mice, and suggests generality among mammals.
The very long telomeres in Sorex granarius (Soricidae, Eulipothyphla) contain ribosomal DNA
TLDR
The results suggest that the major rearrangements that gave rise to today’s karyotype in S. granarius were accompanied by a profound reorganization of chromosome ends, which comprised extensive amplification of telomeric and rDNA repeats on the short arms of acrocentrics and finally contributed to the stabilization of telomeres.
The molecular structure of the DNA fragments eliminated during chromatin diminution in Cyclops kolensis.
TLDR
Results provide evidence of a high organizational ordering of the DNA sequences restricted to the germline, and it appears incorrect to refer to this part of the genome as junk.
Germline-restricted chromosome (GRC) is widespread among songbirds
TLDR
The data suggest that the GRC evolved in the common ancestor of all songbirds and underwent significant changes in the extant descendant lineages, and shows little homology between songbird species.
Germline-restricted chromosome (GRC) in the sand martin and the pale martin (Hirundinidae, Aves): synapsis, recombination and copy number variation
TLDR
A striking similarity in the meiotic behavior of GRCs between martins and estrildid finches is found and it is suggested that the shared features of the meiotics behavior ofGRCs have been supported by natural selection in favor of a preferential segregation of G RCs to the eggs.
Unusual distribution pattern of telomeric repeats in the shrews Sorex araneus and Sorex granarius
TLDR
These results are critical for the interpretation of the well-studied hybrid zones between chromosomal races of S. araneus, given that Rb fission has been postulated in such hybrid zones and that the likelihood of R b fission will relate to presence/absence of telomeric sequences at the centromeres of metacentrics.
DNA Sequences Eliminated during Chromatin Diminution from Somatic Cell Chromosomes of Cyclops kolensis
TLDR
It is shown that chromosomes of presumptive somatic cells of Cyclops kolensis (Crustacea, Copepoda) loose approximately 94% of DNA during the fourth division, and only 6% of the genetic material of the germ line is sufficient for normal development, differentiation, and hystogenesis of the given species.
Germline-Restricted Chromosome (GRC) is Widespread among Songbirds
TLDR
It is proposed that the GRC has formed in the common ancestor of the extant songbirds and undergone subsequent divergence, and could contain genetic element(s) indispensable for gametogenesis, which are yet to be discovered.
Comparative FISH analysis of distribution ofB chromosome repetitive DNA in A an d B chromosomes in two subspecies of Podisma sapporensis (Orthoptera, Acrididae)
TLDR
FISH analysis of B chromosome repetitive DNA distribution in A and B chromosomes of two subspecies of Podisma sapporensis was performed and the only common region enriched with these B chromosome repeats in both subspecies was the X chromosome pericentromeric region.
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