ãååã¯å°åã§ã®äž»äœã®åœ¢æã«ãããŠããã®åœã®æŽå²æžãšãããæ¥æ¬æžçŽããããããšã«æžãããæŽå²æžãçšããå Žåã®èŠåãæžãããã§ã¯ããäžã€ã®æŽå²æžãšããããå€äºèšã«ã€ããŠãã泚æç¹ãæžãæ®ããŠããããã
ãå人çãªèŠè§£ã§ããããå€äºèšã¯æŽå²æžã§ã¯ãªãããšæã£ãŠããããå®åšã®å€©çããããããªããïŒããšæ€æ šãããè«žå ããããããããšæãããå€äºèšã«æžããã倩çã¯å颚諡å·ã§æšå€å€©çãŸã§ã§ãããããŠãæšå€ãŸã§ã®å€©çã§å®åšã確èªããã倩çã£ãŠããããã¯æ®å¿µãªããåãäžããªããã©ããã®å¢ããåºã骚ã®DNAãçŸåšã®å€©çã®ãã®ãšäžèŽãããšãããããªè©±ãèããããšã¯ãã€ãŠäžåºŠããªãã®ã§ãããå€äºèšã«æžãããŠããã®ã¯ç¥è©±ãªã®ã ãšç解ããŠãããã¹ã€ã«å¹Žä»£ããµãããŠããããã§ããªãã®ã«ããã®æžç©ãæŽå²æžãšããŠæ±ãããšèªäœãä¹±æŽãšãããé¯èª€ã§ããã
ãã§ã¯ç¥è©±ãšã¯ãªã«ãããŸãå人çãªç解ãæžããŠæçž®ã§ãããããšããæ代ã®äººã ããããããã¯ãã€ãŠäœåŠããã©ã®ããã«ãã£ãŠæ¥ãŠãã©ã®ããã«ããŠçŸåšã®ç掻ç°å¢ã®ç©ºéã®åœ¢æã«ããã£ããã«ã€ããŠããã®æ代ã®å€ãã®äººã ãããŸãããããã£ãŠçãŸããŠããçããŠä»ã«è³ã£ãŠãããã ããããšåæãã§ãããã®ããããã ãšæã£ãŠãããç¥è©±ãæŽå²çäºå®ãé¡æãšããããšã¯ãã£ãŠããç¥è©±ã¯ãã®ãŸãŸäºå®ãæžããŠãããã®ã§ã¯ãªãã®ã§ãããã©ã¡ãããšãããšããã£ãšæã¯ããã ã£ãâŠãã£ãŠããšã«ãããšããŒããã¡ä»²è¯ãã§ããããããšããå ±çã®ããã®åæã®ç©ã¿éãã§ãã£ããšç解ã§ããã°ãå€äºèšã¯ãšãŠãããããã«èªããŠå¿å°ãè¯ããªãæžç©ã§ããã
ããããå±éºã¯ãããå€äºèšã¯æ±æžæ代ãŸã§ããªããã€ããŒãªååšã§é£è§£ãªäžèä»®åã§æžãããæžç©ã§ãã£ããã®ããæ¬å± 宣é·ã倧å€èŠåŽãããŠããã ãããããã§ãããããã¯çŸåšå€äºèšãèšèªããããšãã§ããããã«ãªã£ãŠããããã§ãããããããèŠæ³šæãªã®ã§ãããæ¬å± 宣é·ã¯ãå€äºèšåæã®é£è§£ãªäžèä»®åã®çŸ åãèšèªããã«ããã£ãŠãæ¥æ¬æžçŽã«ã²ãã¥ããŠäžã€ã²ãšã€ã®æç« ãšè§£éãç©ã¿äžããŠèšèªãããã®ã§ããã
ãããšãã°ãå®ç¥èœé¿æŸãã¯ãå ã®æè£ããšãããããããä¹å·äººã«ãšã£ãŠãé¿æŸïŒé¿èïŒãããæè£ããšãããããšãããã«å¿å°æªããããç解ããã ããã ããããã€ãŸãçŽç²ç¡å¢ã«å€äºèšã®çŸä»£èªèš³ãèªããšããã®ããšãå€äºèšãèªã¿ãªããããã®ããã®æ¥æ¬æžçŽãèªãã§ãããç¶æ ã«é¥ã£ãŠããŸãå±éºãããã®ã§ããã岩波æ庫æ¬ãå€äºèšããèªããšãæ¬æäžã«ãç¥åçåããšããåèªã¯äžåºŠãç»å Žããªãã®ã«ããããããã仲å倩çèšã«ã¯ãç¥åçåã®æ°çŸ åŸèšããšããæ¡ãããŠãããŠããã®ã ïŒãããŸãå šãã®ãªãããã§ããããæ治以åŸã®ãã®åœã®æŽå²å®¶ã«ãšã£ãŠã¯éåæããªãã£ããããªã®ã ããããŸããšã«æãããéãããçšå¿ã§ããã
ãå€äºèšãèªã¿ãªãããããïŒããšéåæãæãããããåæã®äžèä»®åã®åæ€èšãå§ãããæ¥æ¬æžçŽããèªç±ãªèªã¿æ¹ãã§ãããããããªãããªã®ã§å€äºèšãèªããšãã®æ³šæãšããŠããå€äºèšãšæ¥æ¬æžçŽã¯ãŸã£ããå¥ã®æžç©ããšããæèã倱ã£ãŠã¯ãªããªãããŸããèšçŽããšããåèªè¡šçŸã§ãå€äºèšãšæ¥æ¬æžçŽãç¡æèã«æ··åãããåèªãçšããããæç« ã«ã¯æ³šæããæ¹ãããããã®çè ã¯ãèšã»çŽãäž¡è ã®éãã«ã€ããŠå šãç¡æèã ããã§ããã
ãããŠæåŸã«ãå°åã®äž»äœã圢æããããšãããšãã«ãå€äºèšããç¥è©±ãèªã£ãŠã¿ããâŠããªããŠãããã¡ãããªããšã§ããã®ãäžå®ã«ãªããããããããªããããããã®ã§ããããªããçŸå®ã§å ããšæã£ãŠããç念ãä¿¡æ¡ãèªãããããŠææ ãªã©ã¯ãæå€ãšãã€ã¯ããªãæºããŠäžå®å®ãªãã®ãªã®ã§ã¯ãªãã ãããããšããšãæåŸãŸã§ã€ãè©°ãããšãèªåã¯ãèªåãã¡ã¯ãèªåãã¡ãšããŠäœãã©ãä¿¡ããŠçããŠããããããšããç©èªã®å ±æããæ°ããå ±åäœã圢æããæ žã«ãªãã®ã ãããšæã£ãŠãããã¯ããããã£ãããããéã®ãæ°ããç¥è©±ãã®å¯èœæ§ãããã®ã§ã¯ãªãããšèããŠããã®ã§ããã
ãæ°ããæ¯é è ã¯ãã®ãæ¯é ã®æ£çµ±ãªæŽå²ããã€ããããšããæ°ããå ±åäœã圢æããããšããå°åã®äººã ã¯ããéå»ããä»ãããŠæªæ¥ãžãã®ç¥è©±ãèªãããã®ã§ã¯ãªãã§ã ããããé·ã ãšæžããªãã仮説ã§çµãã£ãŠããŸãããããŸã倱瀌ã