Sex chromosomes, sex determination, and sex-linked sequences in Microtidae

@article{Marchal2003SexCS,
  title={Sex chromosomes, sex determination, and sex-linked sequences in Microtidae},
  author={Juan Alberto Marchal and Manuel de Jes{\'u}s Acosta and M{\'o}nica Bullejos and Rafael Diaz de la Guardia and A. S{\'a}nchez},
  journal={Cytogenetic and Genome Research},
  year={2003},
  volume={101},
  pages={266 - 273}
}
The Arvicolidae is a widely distributed rodent group with several interesting characteristics in their sex chromosomes. Here, we summarize the actual knowledge of some of these characteristics. This mammalian group has species with abnormal sex determination systems. In fact, some species present the same karyotype in both males and females, with total absence of a Y chromosome, and hence of SRY and ZFY genes. Other species present fertile, sex-reversed XY females, generally due to mutations… 
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TLDR
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Molecular Composition of Heterochromatin and Its Contribution to Chromosome Variation in the Microtus thomasi/Microtus atticus Species Complex
The voles of the Microtus thomasi/M. atticus species complex demonstrate a remarkable variability in diploid chromosomal number (2n = 38–44 chromosomes) and sex chromosome morphology. In the current
Sex chromosome polymorphism in Bulgarian populations of Microtus guentheri (Danford & Alston, 1880)
TLDR
The sex chromosomes exhibit interpopulation variation in morphology and heterochromatin patterns, which probably originated as a result of random amplification of sequences as have been proposed in other species of the genus Microtus.
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