Special cross
Sex reversed XY 9
XYc? X X Y 9
Neomale ZW &
Embryonic graft
ZW9 ->ZW(^
Neofemale (XY)
Hormonal treatment
XYo*->XY9
Neofemale (ZZ)
Hormonal treatment
Embryonic graft
ZZc?-*ZZ9
Neofemale (YY)
Hormonal treatment
YY c? -+ YY 9
YY
&
ZW
XY
9
ZZ
9
YY
9
Oryzias
Yamamoto (1955)
Ambystoma
Humphrey (1945)
Xenopus
Mikamo and Witschi (1963)
Oryzias
Yamamoto (1953, 1955)
Pleurodeles
Gallien (1954)
Ambystoma
Humphrey (1945)
Chang and Witschi (1955)
Xenopus
Gallien (1955a, 1956)
Oryzias
Yamamoto (1963)
a Formulae ZZ, ZW, and so on indicate genetic constitution; symbols d\ 9 indicate sexual phenotype and gametes.
D E V E L O P M E N T S IN S E X U A L O R G A N O G E N E S I S
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