“…B chromosomes (Bs), supernumerary, accessory or additional chromosomes, are extra ones to ordinary (regular) chromosome sets (A chromosomes, As). They are found in vertebrate and invertebrate animals, fishes, amphibians, fungi, ferns, gymnosperm and angiosperm plants (Müntzing, 1974;Orlov, 1974;Jones, 1975Jones, , 1995Jones & Rees, 1982;Jones & Houben, 2003;Green, 2004;Palestis et al, 2004;Trivers et al, 2004;Jones et al, 2008;Kunakh, 2010;Houben et al, 2011Houben et al, , 2013Houben et al, , 2014Borisov, 2014;Datta et al, 2016;Borisov & Myshliavkina, 2019;Muratova, 2021). B chromosomes are widely distributed among different organisms and are a general phenomenon in eucaryotes.…”