What does cousin mean?

Mother and her mother's brothers and sisters are cousins.

Cousin means:

Because the older girl must be the daughter of aunt and uncle.

An uncle (mother's brother) or aunt (father's sister) whose daughter is older than herself is called a cousin.

An uncle (mother's brother) or aunt (father's sister) who is older than himself is called a cousin.

Cousin also refers to the daughter of father's brother, that is, the daughter of uncle/Guan Zhong/uncle/Ji's father. Because you are family. Sisters from the same father/grandfather/nurse. Girls don't have paternal Y chromosome genes. Girls and cousins have 25% X-linked genes. Boys and cousins have 0% X-linked genes.

Extended data:

Represents brothers and sisters who live under one roof and grow up together. Not since the separation.

Daughters of mothers or fathers are called cousins.

She originally meant the daughter of her mother's sister, that is, the daughter of her aunt/mother/nanny/nanny. Because you have the same surname. Sisters of the Queen Mother/Grandmother/Grandmother. There is 100% maternal mitochondrial mtDNA gene. Girls and cousins have 25% X-linked genes. Boys and cousins have 50% X-linked genes.

Baidu encyclopedia-cousin

Baidu encyclopedia-cousin