Autosexing works with pure breeds. For example: Cream Legbar hen x Cream Legbar rooster = autosexing Cream Legbar chicks. Breed those chicks, and their chicks will also be autosexing Cream Legbars. You can keep it going forever.
I'm sure this has been asked many times before, sorry, but I haven't seen it...
What genes actually make for autosexing that breeds true?