Deeply conserved synteny resolves early events in vertebrate evolution.
-[[!pmid 32313176 desc="Most of the 19 amphioxus (lancelet) chromosomes directly correspond to one of the 17 ancestral chordate linkage groups. Pattern of paralogue elimination show that autotetraploidy was followed by allotetraploidy in bony vertebrates."]]
+[[!pmid 32313176 desc="Most of the 19 amphioxus (lancelet) chromosomes directly correspond to one of the 17 ancestral chordate linkage groups. Pattern of paralogue elimination show that autotetraploidy was followed by allotetraploidy in bony vertebrates. Vertebrate and amphioxus mini-chromosomes descend from the ancestral linkage groups too."]]
- The ancestral chordate has 17 chromosomes according to amphioxus assemblies
([[Putnam and coll, 2008|biblio/18563158]], [[Simakov and coll., 2020|biblio/32313176]]).
+ Vertebrate and amphioxus mini-chromosomes also descend from the ancestral
+ chordate linkage groups (CLG).
- The scallop genome has 19 chromosomes, which are syntenic to the 17 ancestral
chordate chromosomes. _Drosophila_ has no synteny with scallop, but _C.