👉 Primogenetic relatives are individuals who share a common ancestor and therefore have an equal chance of inheriting their genetic traits. This concept is often used to explain certain medical conditions, such as Down's Syndrome, in which a person inherits two copies of a gene that causes the disorder. In the context of primogenetic cousins, it means that a child has two parents who are both from the same family and share the same common ancestor. As a result, there is an equal chance for each sibling
