This generation is 1/2 Golden Retriever and 1/2 Poodle.
F1 Goldendoodle (or first time cross) was a standard size Goldendoodle and the first to be bred. It is the product of a standard Poodle crossed with a Golden Retriever. Most first generation Goldendoodles either don’t shed or shed lightly, and are compatible for most families with mild allergies. The F1 Goldendoodle has more of a shaggy coat with looser curls.
The F1B Goldendoodle (or backcross) is produced by crossing an F1 Goldendoodle with a Poodle. These dogs will have a higher success rate for non-shedding, and are recommended for families with moderate to severe allergies.
Notice that the F1b has a lot more curls and they are tighter curls, more like a Poodle.
This generation is 3/4 Poodle and 1/4 Golden Retriever.
A few breeders are breeding second generation (F2) Goldendoodles which are the product of a Goldendoodle crossed with another Goldendoodle.