Our first generation of alpacas is only just coming up on a year old, so all of the mother-daughter pairs that I'm thinking of were purchased, not produced. This means that I had to like a female enough to buy both her and her mother (or daughter, as it were). This happens not infrequently anyway as part of group deals, but often, one or the other is moved along to a new herd, the logic being, "I don't need both." The ones that stay -- both mother and daughter -- must be superlative enough to warrant keeping both of them. The fact that they're both great means that they must be fairly pre-potent for the traits that I value.
I also have quite a few half-sisters. This is no accident, either.
Here is one mother-daughter pair. Violet (left) is a female who has distinguished herself by producing multiple color-champion grey offspring with amazing reliability. Lois is one of those color-champion offspring. These are girls that I would clone, if I could. (Cloning livestock is actually not all it's cracked up to be.)
These two girls had never met until they came here. Ella is in the rear and Sassy is in the front. They are now pretty close to inseparable.
One of my largest two cohort groups by far are the descendents of Caligula's Casanova, in particular through his two sons, Dually and Pundit. Pictured here are four members of that cohort group. From left to right: Prayer (Casanova daughter who was also pictured above); Princess Leia (one of three Pundit daughters on our farm); Peach (behind) and Bella. Peach and Bella are both Dually daughters who, like Ella and Sassy, had never met before, and who are also now inseparable.