Sibling
Three-quarter (3/4) Siblings (3/4 Brothers/3/4 Sisters): These types of siblings have one common parent, while their unshared parents have a mean consanguinity of 50%. This means that the unshared parents are either siblings or parent and child (similar terminology is used in horse breeding, where it occurs more frequently). Three-quarter siblings share more genes than half siblings, but fewer than full siblings.