1
general::
Follow the example of; also, resemble in appearance, temperament, or character. For example, Bill took after his uncle and began working as a volunteer for the Red Cross. [Mid-1500s]
American Heritage Idioms
2
general::
Phrase(s): take after someone
to resemble a close, older relative. • Don’t you think that Sally takes after her mother? • No, Sally takes after her Aunt Ann.
McGrawhill's American Idioms And Phrasal Verbs