An XX/XY heteromorphic sex chromosome system in the Australian chelid turtle Emydura macquarii: a new piece in the puzzle of sex chromosome evolution in turtles
Chromosomal sex determination is the prevalent system found in animals but is rare among turtles. In fact, heteromorphic sex chromosomes are known in only seven of the turtles possessing genotypic sex determination (GSD), two of which correspond to cryptic sex microchromosomes detectable only with high-resolution cytogenetic techniques. Sex chromosomes were undetected in previous studies of Emydura macquarii, a GSD side-necked turtle. Using comparative genomic hybridization (CGH) and...[Show more]
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