What produces the American yellows?

[Lola B.]

I was curious what two colors were used to produce the yellow variety of P'let.

Thanks!

[RockyandhisFriends]

It is not the breeding of two separate colors that made the American yellow. It is the passing of recessive genes from both parents that cause that cause the mutation.

Here is a link that may partially explain how the yellows were first bred in this country.
http://shadypines.com/yellow-parrotlets.htm

Phil