Each X that is mammalian and chromosomes express some homologous areas.
There are two main segments that are pseudoautosomal that the biggest during the comes to an end to Xp then Yp (32) another plus small area in the Xq to Yq telomeres (33). Also, you can find at the very least 10 various areas spreading through simultaneously arms for the X plus Y chromosomes which are homologous, not included, at chromosome combining in meiosis, ergo to be completely sex-linked (nine). It really is fair inside read these types of parts of homology while vestigial remnants concerning a ancestral couple of autosomes, which is definitely a commonly held see. Your information showcase given ththet a relationship that is similar their intercourse chromosomes to wild wild birds may occur. A couple genes (ATP5A1W to CHD1W) through the chicken W chromosome, up to now the only real genes which were mapped to the chromosome that is gene-poor have always been simultaneously within copies always regarding the Z chromosome. That parts of homology are a couple of elements of each Z chromosome, 1 near to the Zp telomere plus one close to the edge to distal heterochromatin at Zq, as well as each one or even both of the finishes regarding the little W chromosome (Fig.