Supernumerary B chromosomes (Bs) are extra karyotype units in addition to A
chromosomes, and are found in some fungi and thousands of animals and plant species. Bs …

Unisexual taxa are commonly considered short-lived as the absence of meiotic
recombination is supposed to accumulate deleterious mutations and hinder the creation of …

Background One of the biggest challenges in chromosome biology is to understand the
occurrence and complex genetics of the extra, non-essential karyotype elements, commonly …

The living fishes span a unique and interesting set of animals because of their vast diversity,
morphology, ecology, genetics and genomics, and higher importance to biology, economy …

The origin of supernumerary (B) chromosomes is clearly conditioned by their ancestry from
the standard (A) chromosomes. Sequence similarity between A and B chromosomes is thus …

Abstract In the Japanese hagfish Eptatretus burgeri, 16 chromosomes (eliminated [E]-
chromosomes) have been lost in somatic cells (2n= 36), which is equivalent to approx. 21 …

Supernumerary B chromosomes (Bs) are dispensable genetic elements widespread in
eukaryotes and are poorly understood mainly in relation to mechanisms of maintenance and …

African cichlid fishes harbor an extraordinary diversity of sex-chromosome systems. Within
just one lineage, the tribe Haplochromini, at least 6 unique sex-chromosome systems have …

The aim of this paper was to present the second case of B chromosomes in Auchenipteridae
(Trachelyopterus sp.), and to test the hypothesis that the B chromosomes of this species and …

Background B chromosomes are extra elements found in several eukaryote species.
Usually, they do not express a phenotype in the host. However, advances in bioinformatics …