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 and over developed across the tree of life. Nevertheless, the degree of differentiation between your intercourse chromosomes varies considerably across species. As intercourse chromosomes diverge, the Y chromosome gene task decays, leaving genes in the intercourse chromosomes paid down to an individual practical content in men. Mechanisms have actually evolved to pay because of this reduction in gene dosage. Right right Here, we execute a relative analysis of sex chromosome systems across poeciliid species and discover extreme variation in the amount of intercourse chromosome differentiation and Y chromosome degeneration. Furthermore, we find proof for the situation of chromosome-wide dosage compensation in seafood. Our findings have crucial implications for intercourse chromosome regulation and evolution.
As soon as recombination is halted involving the X and Y chromosomes, sex chromosomes start to differentiate and change to heteromorphism. Continue reading “Extreme heterogeneity in intercourse chromosome dosage and differentiation payment in livebearers”