How has Harold defied the laws of heredity?

Harold was an extraordinary child. He was just ten years old but possessed great talent. Unlike his father, he excelled in academics and showed his interest in it. Apart from this, he also sang in the Choir. On the other hand,his father was inclined towards boxing and was very proud of being a professional boxer. It can be concluded
that Harold, defying the laws of heredity, had run to j intellect as his father had run to muscle.