作者: Pamela Bennett-Baker , Jacob L Mueller
DOI: 10.1002/9780470015902.A0025480
关键词: Genetics 、 X:A ratio 、 Biology 、 Human artificial chromosome 、 Karyotype 、 Small supernumerary marker chromosome 、 Sex linkage 、 Ploidy 、 B chromosome 、 Pseudoautosomal region
摘要: Sex chromosomes evolve specialised collections of genes, making them distinct from autosomes. Recent, high-quality, genomic sequencing sex allows us to trace the evolutionary history mammalian X and Y avian Z W chromosomes, examine how evolution has remodelled their gene content. The XY ZW arose ordinary pairs Differentiation into initiated with degeneration content on preservation chromosomes. As these processes unfolded, also acquired new many which are located in large, nearly identical, segmental duplications called amplicons. Ampliconic sequences, independently evolving across multiple lineages, a major driving force chromosome evolution. Key Concepts Mammalian evolved autosomes. X retain majority ancestral autosomal genes. X genes highly conserved mammals. The degenerated. Ampliconic sequences have X, Y, chromosomes. Keywords: sex chromosomes; gene content; ampliconic; DNA sequence; rapid