So a hominid genome is about three billion base pairs, but an elephant and mammoth genome is about two billion base pairs larger, and most of that is composed of small, repetitive DNAs that make it very difficult to actually re-jig the entire structure of the genome.
ヒト科のゲノムは 約30億塩基対ですが 象やマンモスのゲノムは さらに20億の 塩基対ぶん大きく その多くが小さな反復配列 DNAで構成されていて これがゲノム全体の 再構築を難しくしています