pseudoautosomal region


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pseudoautosomal region

A small terminal region of homologous DNA sequences shared by mammalian sex chromosomes, which pair and recombine during ♂ meiosis. Cf Autosomal region, X chromosome inactivation.
References in periodicals archive ?
A distinctive attribute of the pseudoautosomal region is the highly elevated recombination frequency during male meiosis.
In Peromyscus, the heterochromatic short arm of the X chromosome and a corresponding arm of the heterochromatic Y chromosome comprise the pseudoautosomal region (Hale and Greenbaum, 1986; Sudman and Greenbaum, 1990; Hale et al.
The size variability of the Peromyscus Y chromosome similarly indicates the "dispensable" nature of pseudoautosomal heterochromatin, Thus, the pseudoautosomal region is uniquely susceptible to integration and maintenance of transposable elements: retrotransposons can integrate without insertional mutagenesis of functional genetic loci (which would subject these elements to removal by selection), and the effects of unequal recombination would be inconsequential (see Sudman and Greenbaum, 1990).