Frontiers | Evolution of B Chromosomes: From Dispensable …
2021年12月8日 · In this review we describe mechanisms of B chromosome origin, strategies of their inheritance and give examples of the “cellular domestication” of B chromosomes, where these chromosomes provide some important functions for their hosts.
The genetic mechanism of B chromosome drive in rye illuminated …
2024年11月8日 · Here, using a newly-assembled, ~430 Mb-long rye B chromosome pseudomolecule, we identify five candidate genes whose role as trans-acting moderators of the chromosomal drive is supported by...
B chromosomes: from cytogenetics to systems biology
2016年8月24日 · Recent developments in high-throughput DNA/RNA analyses have increased the resolution of B chromosome biology beyond those of classical and molecular cytogenetic methods; B chromosomes contain many transcriptionally active sequences, including genes, and can modulate the activity of autosomal genes.
B Chromosomes - an overview | ScienceDirect Topics
B chromosomes are a heterogeneous class of chromosomes found in the nucleus and also are called accessory or supernumerary chromosomes. B chromosomes are found in many insects, and they probably originate by several mechanisms, including being derived from autosomes and sex chromosomes in intra- and interspecies crosses (Camacho et al. 2000).
What is a B chromosome? Early definitions revisited - PubMed
2024年6月5日 · While there are many characteristics that vary among different B chromosomes, such as their evolutionary origins, size, segregation behaviors, gene content, and function, there is one defining trait of all B chromosomes: they are nonessential for the organism.
B-chromosome evolution. - PMC - National Center for …
2000年2月2日 · B chromosomes are extra chromosomes to the standard complement that occur in many organisms. They can originate in a number of ways including derivation from autosomes and sex chromosomes in intra- and interspecies crosses.
B chromosomes of multiple species have intense evolutionary …
2020年9月23日 · B chromosomes (Bs) are additional and non-essential extra chromosomes, which show non-Mendelian inheritance and lack the ability of meiotic pairing unlike the normal A chromosomes [1, 2]. The genomic characterization of Bs has remained elusive, since the discovery of Bs [ 3 ] about 112 years ago.
B chromosomes: from cytogenetics to systems biology
B chromosomes are classically understood as a sea of repetitive DNA sequences that are poor in genes and are maintained by a parasitic-drive mechanism during cell division.
What is a B chromosome? Early definitions revisited - PMC
While there are many characteristics that vary among different B chromosomes, such as their evolutionary origins, size, segregation behaviors, gene content, and function, there is one defining trait of all B chromosomes: they are nonessential for the organism.
B-Chromosomes - Unacademy
A B-chromosome is a special chromosome found in some species of plants, animals, and insects. It is distinguished by a centromere that is typically located at the centromeric region of the chromosome and contains heterochromatic regions at both ends.
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