Communicated by Mary F. Lyon, healthcare analysis Council, Oxon, great britain (received for review 30, 1998 january)

Among the list of mechanisms whereby intercourse is set in animals, chromosomal intercourse determination can be found in a multitude of remote taxa.

The extensive yet not occurrence that is ubiquitous not within lineages, of chromosomal sex dedication shows that intercourse chromosomes have actually developed separately many times during animal radiation, but firm proof with this is lacking. Read more