Final answer:
In the context of genetics and heredity, two children of the same parents are known as siblings, sharing a unique combination of their parents' genetic material.
Step-by-step explanation:
In biology, especially when discussing genetics and heredity, two children of the same parent class are referred to as siblings.
Siblings share a combination of genetic material from both parents, but except for the case of identical twins, this combination is unique to each child, resulting in individuals who are similar but not genetically identical.
In the context of human development and family relationships, understanding these terms is crucial as it helps explain the transmission of traits and the kinship structure within families.