Edited by David M. Hillis, The University of Texas at Austin, Austin, TX, and authorized August 6, 2019 (gotten for review April 1, 2019)
Morphologically and chromosomes have actually over repeatedly developed over the tree of life. Nevertheless, the degree of differentiation amongst the intercourse 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 developed to pay with this decrease in gene dosage. 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. Furthermore, we find evidence for the full situation of chromosome-wide dosage compensation in fish. Our findings have actually essential implications for intercourse chromosome regulation and evolution.
When recombination is halted involving the X and Y chromosomes, sex chromosomes commence to differentiate and change to heteromorphism. Continue reading “Extreme heterogeneity in intercourse chromosome dosage and differentiation settlement in livebearers”