Frizzle is a feather type and a breed
oops I posted the wrong article this is the one I ment todo https://silkiechickenexperts.com/blogs/silkie/frizzles-and-sizzles-exploring-the-unique-characteristics-of-the-frizzle-silkie-chicken
I would assume that it is somewhere in the parents line whether it is the chicks grandparents, great grandparents, etc
And I would assume that all the chicks will carry a that gene but they may never throw it or only every so often or every time they throw it you just don't know (i have some...
Birds with two frizzling genes are called "frazzles." TWO copies of the frizzling gene can produce problems like an enlarged heart, in addition to poor feather quality produced by doubling those genes.
sizzle combines silkie and frizzle feather types
https://www.mypetchicken.com/blogs/faqs/what-are-frizzles-sizzles-and-frazzles#:~:text=The other feather type, "sizzle,also curled out and windblown.
This is my understanding of sizzles and the rest of them