I knew which questions Miranda had answered but I didn’t know what she had decided. I noted that a certain blankness had gone from his face, that he seemed more intact, smoother in his interactions with us and certainly more expressive. But I struggled to understand what it told me about Miranda or, for that matter, about myself. In humans, recombination is infinitely subtle and then crudely but disarmingly lopsided. The parents merge, like fluids stirred together, but the mother’s face might be faithfully replicated in her child just as the father fails to pass on his gift for comedy.

