Yellowface type 2 opaline cock x Yellowface type 2 albino hen

The facts

Sire: yellowface type 2 opaline cock
Dame: yellowface type 2 albino hen

    Expected offspring
  • skyblue cock/opaline, ino
  • yellowface type 2 cock/opaline, ino (x2)
  • double factor yellowface type 2 cock/opaline, ino
  • skyblue opaline hen
  • yellowface type 2 opaline hen
  • double factor yellowface type 2 opaline hen

    Observed result
  • double factor yellowface type 2 opaline hen
  • albino hen
  • grey opaline hen
  • grey cock
  • double factor yellowface type 2 albino cock

Analysis

There are two unexpected factors in the offspring: grey and ino.

Grey

Grey is a dominant factor, so how can it be that none of both parents show grey? The hen is an ino and as such does not have 'blue' colour. Grey modifies the blue colour (from blue to grey or from green to greygreen). Since there is no blue colour, grey cannot show itself: grey is masked by ino.

So the hen is actually grey:
Dame: yellowface type 2 albino grey hen

Ino

Ino is a sex linked factor. This means that unless the sire is ino or split ino there will be no ino offsping. So the cock must be split ino:
Sire: yellowface type 2 opaline cock/ino

Conclusion

Sire: yellowface type 2 opaline cock/ino
Dame: yellowface type 2 albino grey hen

    Expected offspring
  • skyblue cock/opaline
  • skyblue cock/opaline-ino
  • skyblue opaline hen
  • albino opaline hen
  • grey cock/opaline
  • grey cock/opaline-ino
  • grey opaline hen
  • albino grey opaline hen
  • yellowface type 2 cock/opaline (x2)
  • yellowface type 2 cock/opaline-ino (x2)
  • yellowface type 2 opaline hen (x2)
  • yellowface type 2 albino opaline hen (x2)
  • yellowface type 2 grey cock/opaline (x2)
  • yellowface type 2 grey cock/opaline-ino (x2)
  • yellowface type 2 grey opaline hen (x2)
  • yellowface type 2 albino opaline hen (x2)
  • double factor yellowface type 2 cock/opaline
  • double factor yellowface type 2 cock/opaline-ino
  • double factor yellowface type 2 opaline hen
  • double factor yellowface type 2 albino opaline hen
  • double factor yellowface type 2 grey cock/opaline
  • double factor yellowface type 2 grey cock/opaline-ino
  • double factor yellowface type 2 grey opaline hen
  • double factor yellowface type 2 albino opaline hen
(x2) means twice as probalby as the other lines.

    Offspring
  • double factor yellowface type 2 opaline hen
  • albino-opaline hen
  • grey opaline hen
  • grey cock/opaline [possibly ino]
  • double factor yellowface type 2 albino cock/opaline

(C) Bert Raeymaekers