Nigba ipin ahamo awon kromosomu yi je didameji ninu igbese itunda DNA, to si unpese fun ahamo kookan awon kromosomu pipe tikookan fun won.. 
Mandela lo ọdun mẹtadinlọgbọn (27) ni ẹwọn, o lo opo ọdun yii ni Robben Island.. 