Extreme heterogeneity in intercourse chromosome dosage and differentiation settlement in livebearers

Extreme heterogeneity in intercourse chromosome dosage and differentiation settlement in livebearers

Edited by David M. Hillis, The University of Texas at Austin, Austin, TX, and authorized 6, 2019 (received for review April 1, 2019 august)

Significance

Morphologically and chromosomes have actually over and over repeatedly evolved over the tree of life. Nonetheless, the extent of differentiation between your sex chromosomes differs significantly across types. The Y chromosome gene activity decays, leaving genes on the sex chromosomes reduced to a single functional copy in males as sex chromosomes diverge. Mechanisms have actually evolved to pay with this decrease in gene dosage. Right Here, we execute a relative analysis of intercourse chromosome systems across poeciliid species and unearth extreme variation in their education of intercourse chromosome differentiation and Y chromosome degeneration. Also, we find proof for the full instance of chromosome-wide dosage compensation in seafood. Our findings have actually essential implications for sex chromosome regulation and evolution. […]