Some relationships between grandparents and their grandchildren are better than others. While some grandparents are emotionally close to their grandchildren others are not. Family dynamics has a lot to do with this. Family dynamics has a lot to do with this. While some grandparents are emotionally close to their grandchildren others are not. Family dynamics has a lot to do with this.

Siblings share 50% of their DNA from their father and 50% of their DNA from their mother. They will have 50% matching short tandem repeats on a chromosome from their mother and 50% matching short tandem repeats from their father. This is a specific relationship test as opposed to a general shared ancestry They will have 50% matching short tandem repeats on a chromosome from their mother and 50% matching short tandem repeats from their father.