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人ã ãDNAç¥å éå®ãåããçç±ã¯ããŸããŸã§ãïŒ
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äŸãã°ããã©ãžã«ã«äœããã女æ§ãæ³åããŠã¿ãŠãã ããã圌女ã®å®¶æã®æŽå²ã¯ãæ€æ°å°æä»£ã®èšé²åªå€±ã«ããæ°äžä»£ããé¡ããŸãããDNAéå®ã«ãã£ãŠããããŸã§ç¥ãããŠããªãã£ãå äœæ°æããšãŒãããããã®å ¥æ€è ããŸãã¯å€§è¥¿æŽæšªæå¥Žé·è²¿æã«ãã£ãŠãã©ãžã«ã«ããããããã¢ããªã«ã®ã³ãã¥ããã£ãšã®ã€ãªãããæããã«ãªãã圌女ã®å®¶æã®ç©èªã«éèŠãªæèãå ããå¯èœæ§ããããŸãã
DNAç¥å éå®ã®çš®é¡
ããªãã®ç¥å ã«é¢ããæŽå¯ãæäŸã§ããDNAéå®ã«ã¯ããã€ãã®çš®é¡ããããŸããåéå®ã¯DNAã®ç°ãªãéšåãåæããç¬èªã®æ å ±ãââæäŸããŸãïŒ
1. åžžæè²äœDNA (atDNA)
åžžæè²äœDNAéå®ã¯ãæãäžè¬çãªç¥å éå®ã®çš®é¡ã§ããããã¯ã䞡芪ããåãç¶ããã22察ã®éæ§æè²äœãåæããŸãããã®éå®ã¯ãæ°ææ§æã®æšå®å€ãæäŸããDNAãããã³ã°ãéããŠååœã®èŠªæãšããªããã€ãªããããšãã§ããŸãã
æããã«ãªãããšïŒ
- æ°ææ§æã®æšå®å€ïŒäŸïŒãšãŒãããç³»ãã¢ãžã¢ç³»ãã¢ããªã«ç³»ã®ç¥å ã®å²åïŒã
- éå»5ã6äžä»£ä»¥å ã®ååœã®èŠªæãšã®é¢ä¿ã
- ããªãã®ç¥å ã®å°ççèµ·æºã
äŸïŒ ã«ããã«äœã人ç©ãããã®å°åãžã®æŽå²çãªç§»äœãã¿ãŒã³ãšäžèŽãããããªãã®ã¢ã€ã«ã©ã³ããã¹ã³ããã©ã³ããã¹ã«ã³ãžããã¢ã®ç¥å ãæã£ãŠããããšãçºèŠãããããããŸããã
2. Y-DNA
Y-DNAéå®ã¯ãç¶ããæ¯åãžãšåãç¶ãããYæè²äœãåæããŸãããã®éå®ã¯ç·æ§ã®ã¿ãå©çšå¯èœã§ãç¶ç³»ã®çŽç³»ã远跡ããŸãã
æããã«ãªãããšïŒ
- ããªãã®ç¶ç³»ã®ãããã°ã«ãŒãïŒç¶æ¹ã§å ±éã®ç¥å ãæã€äººã ã®ã°ã«ãŒãïŒã
- ããªãã®ç¶ç³»ç¥å ã®ç§»äœãã¿ãŒã³ã
- èåãããžã§ã¯ããåãèåãæã€ä»ã®ç·æ§ãšã®ã€ãªããã
äŸïŒ ãªãŒã¹ãã©ãªã¢ã«äœãç·æ§ããèªèº«ã®ç¶ç³»ãã€ã®ãªã¹ãã¢ã€ã«ã©ã³ãã®ç¹å®ã®å°åãŸã§é¡ãããšãã§ããç³»èåŠç ç©¶ã«è²Žéãªæ å ±ãæäŸããå¯èœæ§ããããŸãã
3. ããã³ã³ããªã¢DNA (mtDNA)
ããã³ã³ããªã¢DNAéå®ã¯ãæ¯ããåãžãšåãç¶ãããããã³ã³ããªã¢å ã®DNAãåæããŸããç·æ§ã女æ§ããã®éå®ãåããŠãæ¯ç³»ã®çŽç³»ã远跡ããããšãã§ããŸãã
æããã«ãªãããšïŒ
äŸïŒ æ¥æ¬ã«äœã女æ§ããèªèº«ã®æ¯ç³»ãæ±åã¢ãžã¢ã®ç¹å®ã®å°åã«é¡ãããšãçºèŠãããããŸã§ç¥ãããŠããªãã£ãç°æåãšã®ã€ãªãããæããã«ãããããããŸããã
4. X-DNA
X-DNAã¯ãç·æ§ã女æ§ãã«ãã£ãŠéºäŒã®ä»æ¹ãç°ãªããŸãã女æ§ã¯äž¡èŠªãã1ã€ãã€Xæè²äœãåãç¶ããŸãããç·æ§ã¯æ¯èŠªãã1ã€ã®Xæè²äœããç¶èŠªããYæè²äœãåãç¶ããŸããX-DNAãåæããããšã§ãç¹å®ã®ç¥å 系統ããã®ç¥å ã«é¢ããæããããåŸãããšãã§ããŸãã
æããã«ãªãããšïŒ
- ç¹å®ã®ç¥å 系統ããã®ç¥å æ å ±ïŒç¹ã«è€éãªé¢ä¿ãæç¢ºã«ããã®ã«åœ¹ç«ã¡ãŸãïŒã
- åžžæè²äœDNAã«ãã£ãŠç€ºåãããé¢ä¿ã®ç¢ºèªã
äŸïŒ ããç·æ§ã®åžžæè²äœDNAãç¹å®ã®æ°æã°ã«ãŒããšã®åŒ·ãã€ãªããã瀺åããŠããå Žåã圌ã®X-DNAãåæããããšã§ããã®ã€ãªãããäž»ã«æ¯èŠªåŽããæ¥ãŠããã®ããç¶èŠªåŽããæ¥ãŠããã®ãã倿ããã®ã«åœ¹ç«ã¡ãŸãã
é©åãªDNAéå®ã®éžæ
ããªãã«ãšã£ãŠæé©ãªDNAéå®ã¯ãç¹å®ã®ç®æšã«ãã£ãŠç°ãªããŸããäž»ã«æ°ææ§æã®æšå®ãååœã®èŠªæãèŠã€ããããšã«é¢å¿ãããå Žåã¯ãåžžæè²äœDNAéå®ãè¯ãåºçºç¹ã§ããç¶ç³»ãŸãã¯æ¯ç³»ã®çŽç³»ã远跡ãããå Žåã¯ãY-DNAãŸãã¯mtDNAéå®ãããé©åã§ããäžéšã®äŒæ¥ã¯ãè€æ°ã®çš®é¡ã®éå®ãå«ãçµã¿åããããã±ãŒãžãæäŸããŠããŸãã
DNAéå®äŒç€Ÿãéžã¶éã«ã¯ã以äžã®èŠçŽ ãèæ ®ããŠãã ããïŒ
- ããŒã¿ããŒã¹ã®èŠæš¡ïŒ ããŒã¿ããŒã¹ã倧ããã»ã©ãDNAããããèŠã€ããå¯èœæ§ãé«ãŸããŸãã
- æ°ææ§æã®å ±åïŒ äŒæ¥ããšã«ç°ãªãåç §éå£ã䜿çšããŠãããããæ°ææ§æã®æšå®å€ã«åœ±é¿ãäžããå¯èœæ§ããããŸãã
- ãã©ã€ãã·ãŒããªã·ãŒïŒ ããªãã®DNAããŒã¿ãã©ã®ããã«ä¿åããã䜿çšãããããçè§£ããŠãã ããã
- ããŒã«ãšæ©èœïŒ æè²äœãã©ãŠã¶ãå®¶ç³»å³ãã«ããŒãé«åºŠãªãããã³ã°ããŒã«ãªã©ã®æ©èœãæ¢ããŠãã ããã
- è²»çšïŒ ããŸããŸãªéå®ãšäŒæ¥ã®äŸ¡æ Œãæ¯èŒããŠãã ããã
DNAéå®ã®ããã»ã¹
DNAéå®ã®ããã»ã¹ã¯äžè¬çã«ç°¡åã§ãïŒ
- DNAéå®ãããã®æ³šæïŒ ä¿¡é Œã§ããDNAéå®äŒç€Ÿããããããè³Œå ¥ããŸãã
- DNAãµã³ãã«ã®æ¡åïŒ ãããã«èšèŒãããŠããæç€ºã«åŸã£ãŠãéåžžã¯åŸæ¶²ãµã³ãã«ãŸãã¯é ¬ã®å åŽããããæ¹æ³ã§DNAãµã³ãã«ãæ¡åããŸãã
- ãããã®ç»é²ïŒ ãªã³ã©ã€ã³ã§ããããæå¹åããèªåã®ã¢ã«ãŠã³ãã«ãªã³ã¯ãããŸãã
- ãµã³ãã«ã®éµéïŒ æäŸãããåæãé éã©ãã«ã䜿çšããŠãDNAãµã³ãã«ãéå®äŒç€Ÿã«è¿éããŸãã
- çµæã®åãåãïŒ çµæãåŠçãããã®ãåŸ ã¡ãŸããããã«ã¯æ°é±éããæ°ã¶æãããããšããããŸãã
DNAç¥å éå®çµæã®è§£é
DNAç¥å éå®ã®çµæãçè§£ããã«ã¯ãæ éãªåæãšè§£éãå¿ èŠã§ããèæ ®ãã¹ãäž»ãªåŽé¢ã¯æ¬¡ã®ãšããã§ãïŒ
1. æ°ææ§æã®æšå®
æ°ææ§æã®æšå®ã¯ãåç §éå£ãšã®æ¯èŒã«åºã¥ããŠãããªãã®ç¥å ã®èµ·æºã®å èš³ãæäŸããŸãããããã®æšå®ã¯æ±ºå®çãªãã®ã§ã¯ãªããäŒæ¥ã«ãã£ãŠç°ãªãå¯èœæ§ãããããšãèŠããŠããããšãéèŠã§ããæ°ææ§æã®æšå®ã¯ç¢ºçã«åºã¥ããŠãããç¥å ã®æ£ç¢ºãªè¡šçŸã§ã¯ãªãããããŸã§ã¬ã€ããšããŠèŠãã¹ãã§ãã
æ°ææ§æã®æšå®ã«åœ±é¿ãäžããå¯èœæ§ã®ããèŠå ã«ã¯ã次ã®ãã®ããããŸãïŒ
- åç §éå£ïŒ æ°ææ§ææšå®ã®ç²ŸåºŠã¯ãéå®äŒç€Ÿã䜿çšããåç §éå£ã®èŠæš¡ãšå€æ§æ§ã«äŸåããŸãã
- éºäŒçæ··åïŒ å€ãã®éå£ã¯ãæŽå²çãªç§»äœã亀æµã«ãããæ··åããç¥å ãæã£ãŠããŸãã
- çµ±èšã¢ã«ãŽãªãºã ïŒ äŒæ¥ããšã«æ°ææ§æã®æšå®ãèšç®ããããã«ç°ãªãã¢ã«ãŽãªãºã ã䜿çšããŸãã
äŸïŒ ãã人ãã40ïŒ ãã¢ã€ã«ã©ã³ãç³»ã30ïŒ ãã€ã®ãªã¹ç³»ã30ïŒ ãã¹ã«ã³ãžããã¢ç³»ãšããæ°ææ§æã®æšå®ãåãåã£ããšããŸããããã¯åœŒãã®ç¥å ã®å šäœåãæäŸããŸãããå¿ ããã圌ãã®ç¥å ãçŽç²ã«ã¢ã€ã«ã©ã³ã人ãã€ã®ãªã¹äººããŸãã¯ã¹ã«ã³ãžããã¢äººã§ãã£ãããšãæå³ããããã§ã¯ãããŸããããããã®éå£éã§ã¯ãæéãšãšãã«ããªãã®æ··åããã£ãå¯èœæ§ããããŸãã
2. DNAããã
DNAããããšã¯ãããªããšDNAã®ã»ã°ã¡ã³ããå ±æããå人ã§ãããå®¶æé¢ä¿ã瀺åããŸããé¢ä¿ãè¿ãã»ã©ãå ±æããDNAã®éãå€ããªããŸããDNAéå®äŒç€Ÿã¯ãDNAããããåæããããã®ããŒã«ãæäŸããŠããŸããããã«ã¯ä»¥äžãå«ãŸããŸãïŒ
- é¢ä¿ã®äºæž¬ïŒ ããªããšãããçžæãšã®é¢ä¿ã®è¿ãã®æšå®ïŒäŸïŒããšããã¯ãšããã¿ããšãïŒã
- å ±æDNAïŒ ãããçžæãšå ±æããDNAã®éãã»ã³ãã¢ã«ã¬ã³ïŒcMïŒã§æž¬å®ãããŸãã
- å ±éã®ç¥å ïŒ ãããçžæãšå ±æããå ±éã®ç¥å ãç¥å ã®å§ã
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3. ãããã°ã«ãŒã
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äŸïŒ ããªãã®Y-DNAãããã°ã«ãŒããR-M269ã§ããå Žåãããã¯ããªãã®ç¶ç³»ã®çŽç³»ç¥å ã西ãšãŒãããã§çºçããéé åšæä»£ã«å€§éžå šäœã«åºãã£ãå¯èœæ§ãé«ãããšã瀺ããŠããŸãã
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