Crested Budgerigars

" Initiator Theory " on Crest of Budgerigar

P : Full Circular(CdCd, CiCi)　x　Normal(crcr, cici)　=　F1 : Tufted(Cdcd, Cici)

F2

	Cd, Ci	cd, Ci	Cd, ci	cd, ci
Cd, Ci	CdCd, CiCi Full Circular	Cdcd, CiCi Full Circular	CdCd, Cici One-Half Crest	Cdcd, Cici Tufted
cd, Ci	Cdcd, CiCi Full Circular	cdcd, CiCi Visual Normal	Cdcd, Cici Tufted	cdcd, Cici Visual Normal
Cd, ci	CdCd, Cici One-Half Crest	Cdcd, Cici Tufted	CdCd, cici Visual Normal	Cdcd, cici Visual Normal
cd, ci	Cdcd, Cici Tufted	cdcd, Cici Visual Normal	Cdcd, cici Visual Normal	cdcd, cici Normal Wild

Symbols :

　Cd = Crest-determining　　　cd = Non Crest(Wild type)
　 Ci = Crest-initiating　　　 ci = Crest-inhibiting(Wild type)