You Wish to Determine If a Male Child Is the Descendant

Multiple Choice

You wish to determine if a male child is the descendant of your grandfather.However,your grandfather is only known to have had daughters.The best strategy is to

A) compare the child's X chromosome with the X chromosome of your grandfather's sister.
B) compare the child's Y chromosome with the X chromosome of your grandfather's sister.
C) compare the child's X chromosome with the X chromosome of your grandfather's brother.
D) compare the child's Y chromosome with the Y chromosome of your grandfather's brother.
E) Because your grandfather only had daughters,there is no way to test such a relationship.