|Indy, after a haircut|
Goldendoodles are a cross between a Golden Retriever and a Poodle. Minature Goldendoodles are created, at least initially, by artificially breeding a Toy Poodle and a Golden Retriever.
Both Indy and Buddy are "F1B" Goldendoodles, so their puppies are called Multi-gen (3rd generation).
Here's Indy's puppies' Goldendoodle family tree:
Golden Retriever + Poodle = F1 (Theoretically, 50% of each breed)
F1 + Poodle = F1B (The "B" stands for backcross. Theoretically, these are 75% Poodle and 25% Retriever - both Indy and Buddy are F1B's)
F1B + F1B = Multi-generation (Theoretically, 75% Poodle and 25% Retriever, just like their parents)
The Multi-gen Goldendoodles are a little more rare because they take three generations to create. Their characteristics are very similar to their parents. So theoretically, that should mean Indy's puppies have curlier hair than an F1 Goldendoodle, because they have more Poodle in their bloodline. The Goldendoodles with the curlier or wavier hair are known for being more shed less and hypoallergenic than their straighter haired counterparts.
Here's a good summary from a prominent Goldendoodle breeder about Multi-gens.
If you're interested in one of Indy's puppies, do your research, and let us know if you have any questions. Thanks!