the applet doesn’t fall far from the tree – children are like their parents [idiom][wikiAnswer]

On the “Two and a half men”, Judith is Alan’s ex-wife. On Christmas eve, Judith and her boyfriend dropped by at Charlie’s house. The moment Judith saw newly made eggnog, she instantly falled for the alcohol. Alan said to Judith’s boyfriend: “The apple doesn’t fall far from the tree, does it?” A similar idiom is “Like father, like son.”