[like father, like son] A son is usually like his father in the way he acts. — A proverb.
* /Frank's father has been on the city council; he is now the mayor, and is running for governor. Frank is on the student council and is likely to he class president. Like father, like son./* /Mr. Jones and Tommy are both quiet and shy. Like father, like son./
Compare: SPITTING IMAGE, FOLLOW IN ONE'S FOOTSTEPS.