proverb meaning 'like father, like son' — children resemble their parents; traits or abilities are inherited.
彼の息子も絵が上手だ。蛙の子は蛙だね。
His son is also good at drawing. Like father, like son.
あの政治家の批判の仕方は父親にそっくりだ。蛙の子は蛙ということか。
That politician's way of criticizing is just like his father's. I guess it really is 'like father, like son.'
音楽一家だから、子どもたちは自然と歌が上手になった。蛙の子は蛙だ。
Because it's a musical family, the children naturally became good singers. Like father, like son.