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 …

B chromosomes represent additional chromosomes found in many eukaryotic organisms.
Their origin is not completely understood but recent genomic studies suggest that they …

This book provides an up-to-date review of the biology of parasitic Hymenoptera, focusing
primarily on genetics, developmental biology, physiology, anatomy and molecular biology …

Astyanax scabripinnis possesses a widespread polymorphism for metacentric B
chromosomes as large as the largest chromosome pair in the A complement. On the basis of …

Primary studies on whole sequenced genomes focused on single genes and little attention
was directed to repetitive DNAs, and duplicated segments. Single-and few-copy sequences …

Background Diverse plant and animal species have B chromosomes, also known as
accessory, extra or supernumerary chromosomes. Despite being widely distributed among …

The cyprinid fish Alburnus alburnus possesses one of the largest supernumerary
chromosomes in all vertebrates. In the present study, amplified fragment length …

Little is known about the origin and evolution of supernumerary (B) chromosomes. This
study utilizes molecular markers to examine the evolutionary history and microstructural …

PSR (paternal sex ratio) chromosomes are a type of supernumerary (or B) chromosomes
that occur in haplodiploid arthropods. They are transmitted through sperm but then cause …

The study of B chromosomes (Bs) started more than a century ago, while their presence in
mammals dates since 1965. As the past two decades have seen huge progress in …