Ontology highlight
ABSTRACT:
SUBMITTER: Clark FE
PROVIDER: S-EPMC6934658 | biostudies-literature | 2019 Dec
REPOSITORIES: biostudies-literature
Scientific reports 20191227 1
B chromosomes are extra, non-essential chromosomes present in addition to the normal complement of A chromosomes. Many species of cichlid fish in Lake Malawi carry a haploid, female-restricted B chromosome. Here we show that this B chromosome exhibits drive, with an average transmission rate of 70%. The offspring of B-transmitting females exhibit a strongly female-biased sex ratio. Genotyping of these offspring reveals the B chromosome carries a female sex determiner that is epistatically domina ...[more]