We review some recently published results on sex chromosomes in a diversity of species.
We focus on several fish and some plants whose sex chromosomes appear to be 'young', as …

Sex is prevalent in nature and sex determination is one of the most fundamental biological
processes, while the way of initiating female and male development exhibits remarkable …

We present a draft genome sequence of the platypus, Ornithorhynchus anatinus. This
monotreme exhibits a fascinating combination of reptilian and mammalian characters. For …

The development of genetic sex determination and cytologically distinct sex chromosomes
leads to the potential problem of gene dosage imbalances between autosomes and sex …

Differentiated sex chromosomes in mammals and other vertebrates evolved independently
but in strikingly similar ways. Vertebrates with differentiated sex chromosomes share the …

The chromosome complements (karyotypes) of animals display a great diversity in number
and morphology. Against this background, the genomes of all species are remarkably …

In therian mammals (placentals and marsupials), sex is determined by an XX female: XY
male system, in which a gene (SRY) on the Y affects male determination. There is no …

Humans, mice, and even kangaroos have an XX female: XY male system of sex
determination, in which the Y harbors a male-dominant sex-determining gene SRY. Birds …

As a result of sex chromosome differentiation from ancestral autosomes, male mammalian
cells only contain one X chromosome. It has long been hypothesized that X-linked gene …

In birds, as in mammals, one pair of chromosomes differs between the sexes. In birds, males
are ZZ and females ZW. In mammals, males are XY and females XX. Like the mammalian …