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A new look at the evolution of avian sex chromosomes

Stiglec, Rami; Ezaz, Tariq; Graves, Jennifer


Birds have a ubiquitous, female heterogametic, ZW sex chromosome system. The current model suggests that the Z chromosome and its degraded partner, the W chromosome, evolved from an ancestral pair of autosomes independently from the mammalian XY male heteromorphic sex chromosomes - which are similar in size, but not gene content (Graves, 1995; Fridolfsson et al., 1998). Furthermore the degradation of the W has been proposed to be progressive, with the basal clade of birds (the ratites)...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Cytogenetic and Genome Research
DOI: 10.1159/000103170


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