Just W. White M. FISH and DAPI staining of the synaptonemal complex of the Nile tilapia Oreochromis niloticus allow orientation of the unpaired region of bivalent 1 observed during early pachytene.
Rent this article via DeepDyve. Namespaces Article Talk. In subgenera Ellobius, the X chromosomes are large acrocentrics, undistinguishable by G-band in different species [ Chromosome evolution in Australian Rattus—G-banding and hybrid meiosis.
Karyological characteristies of four Ellobius species. Y chromosomal infertility Y chromosome deletions Y chromosome micro-deletions. This is due to the fact that the haploid eggs double their chromosomes, resulting in ZZ or WW.
Similarly, work on invertebrates has revealed an exceptional diversity of sex chromosome systems [ 2728 ]. Are all sex chromosomes created equal? Comparative analysis of a sex chromosome from the blackchin tilapia, Sarotherodon melanotheron.
However, more recent work has demonstrated that the mapped sex chromosome system on LG1 does not correspond to this large chromosome [ 66 ]; thus, it seems likely that this incomplete pairing was the result of highly repetitive regions residing on LG3 [ 76 ] and not a lack of homology between sex chromosomes.
Sex-specific differences in the synaptonemal complex in the genus Oreochromis Cichlidae Genetica. McMahan C. Some have argued that the number of genes capable of being the master sex-determination locus is limited because the sex chromosome systems characterized to date involve a small handful of genes [ ].
Mitochondrial DNA phylogeny of the family Cichlidae: Monophyly and fast molecular evolution of the neotropical assemblage.