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Development regarding the sex that is avian from an ancestral set of autosomes

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

One of the mechanisms whereby intercourse is set in animals, chromosomal intercourse determination can be found in a wide selection of remote taxa.

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