Question

how does an xx female inherit her two chromosomes?
both are from her father.
she inherits one from her mother, which then duplicates to give her two.
one is from her mother and one is from her father.
both are from her mother, or she inherits one from her mother, which then duplicates to give her two.
both are from her mother.

Explanation:

In humans, females have two X chromosomes. Each parent contributes one sex chromosome: the mother (XX) can only pass an X chromosome, and the father (XY) can pass either X or Y. For a female offspring, the father must pass an X, so she inherits one X from the mother and one X from the father.

Answer:

One is from her mother and one is from her father.