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africa hypothesis
相关语句
  非洲假说
     On the Human Origin of Africa Hypothesis Related to Two Time-levels and its Etymological Relation
     论非洲假说的两个时间层次和语源关系
短句来源
     The human origin of Africa Hypothesis refers to His first going out of Africa and His second going out of Africa.
     人类起源非洲假说需要分成两种情况:第一次走出非洲和第二次走出非洲。
短句来源
  相似匹配句对
     AFRICA
     非洲
短句来源
     africa
     走入非洲
短句来源
     On TCM Hypothesis
     试论中医假说
短句来源
     Research hypothesis
     研究假设
短句来源
     On the Human Origin of Africa Hypothesis Related to Two Time-levels and its Etymological Relation
     论非洲假说的两个时间层次和语源关系
短句来源
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  africa hypothesis
These differences have a bearing on the out-of-Africa hypothesis for the origin of the DM mutation.
      


Y chromosome is another focus of human evolutionary studies after mitochondrial DNA, which has also approved the "out of Africa" hypothesis. The mutation rate of haplotypes of single nucleic polymorphisms (SNP) on Y chromosome matches that of ethnic evolvements well, so Y_SNPs become the most measurable genetic materials in ethnicity nowadays. Among hundreds of Y_SNPs found, M119C mutation is the characteristic of Daic, and haplotypes of M119C_M110C and M95T_M88G can hardly be found out of Daic...

Y chromosome is another focus of human evolutionary studies after mitochondrial DNA, which has also approved the "out of Africa" hypothesis. The mutation rate of haplotypes of single nucleic polymorphisms (SNP) on Y chromosome matches that of ethnic evolvements well, so Y_SNPs become the most measurable genetic materials in ethnicity nowadays. Among hundreds of Y_SNPs found, M119C mutation is the characteristic of Daic, and haplotypes of M119C_M110C and M95T_M88G can hardly be found out of Daic and Austronesian. Maqiao Culture lies on but is quite different from Liangzhu Culture, and it is also a question whether the people of these two cultures are the same population. So Y_SNPs are tested in the populations of Liangzhu Period, Maqiao Period, Waring States Period, Ming Dynasty and modern population in Maqiao district, and high frequencies of M119C and M95T are found. The results show that people in Maqiao district are always Daic people genetically from 6000 year ago to now, never Hmong_Mien. These Shanghai aborigines self_proclaimed "Dangdaic" are most similar to Taiwan aborigines on genetic structure, and also fairly close to Kam_Tai peoples in Southwest China. Principle component analysis and correlation analysis between components and haplotypes shows that H9 and H11 haplotypes differentiates West and East Daic, H7 recognizes Hmong_Mien, H8 Sino_Tibetan. Y_SNP haplotypes divide the ethnic groups clearly, that shows these are good materials of ethnicity, and worth of further studies.

 Y染色体是继线粒体之后的研究人类进化的又一热点,通过对其上的多态性位点研究也证实了非洲起源说.Y染色体上的各单核苷酸多态(SNP)位点组合成的单倍型与民族系统的时间发生尺度比较一致,所以是鉴别民族迄今最恰当的遗传材料.M119C这一SNP突变是百越民族的特色,M119C_M110C和M95T_M88G更是百越的特有种.良渚文化的族属是考古学界的一个争议焦点,有百越和三苗两种说法.良渚文化与马桥文化之间差异极大,其居民遗传上是否继承也是有问题的.本项研究通过对马桥地区良渚时期、马桥时期、战国、明代及现代居民Y染色体若干SNP位点的检测,重点考察了M119位点,发现马桥地区各时期的居民都有较高的M119C和M95T类型,具有典型的百越特征,而没有苗瑶的特征.这说明自古以来马桥地区居民都是越人,并且一脉传承至今.现代上海的原住民"宕傣"人与台湾原住民的遗传结构最接近,其次接近西南部的侗傣民族.主成分分析及主成分与Y染色体单倍型的相关分析发现,单倍型H9和H11区分了东越与西越,H7区分了苗瑶,H8区分出了氐羌,H11与H5区分了濮越系统与非濮越系统.各单倍型能对各民族系统较清晰地区分和代表,是族属分析的良好材料,...

 Y染色体是继线粒体之后的研究人类进化的又一热点,通过对其上的多态性位点研究也证实了非洲起源说.Y染色体上的各单核苷酸多态(SNP)位点组合成的单倍型与民族系统的时间发生尺度比较一致,所以是鉴别民族迄今最恰当的遗传材料.M119C这一SNP突变是百越民族的特色,M119C_M110C和M95T_M88G更是百越的特有种.良渚文化的族属是考古学界的一个争议焦点,有百越和三苗两种说法.良渚文化与马桥文化之间差异极大,其居民遗传上是否继承也是有问题的.本项研究通过对马桥地区良渚时期、马桥时期、战国、明代及现代居民Y染色体若干SNP位点的检测,重点考察了M119位点,发现马桥地区各时期的居民都有较高的M119C和M95T类型,具有典型的百越特征,而没有苗瑶的特征.这说明自古以来马桥地区居民都是越人,并且一脉传承至今.现代上海的原住民"宕傣"人与台湾原住民的遗传结构最接近,其次接近西南部的侗傣民族.主成分分析及主成分与Y染色体单倍型的相关分析发现,单倍型H9和H11区分了东越与西越,H7区分了苗瑶,H8区分出了氐羌,H11与H5区分了濮越系统与非濮越系统.各单倍型能对各民族系统较清晰地区分和代表,是族属分析的良好材料,值得深入研究.

The occurrence and evolution of anatomically modern Homo sapiens have been the subjects of controversy between exponents of two major competing hypotheses: multiregional origins versus “recent out of Africa”. This paper makes a brief review on the technical advances in Quaternary geochronology achieved during the past over 20 years and their impacts on the timescale of recent human evolution. Based on the U-series dating of intercalated speleothem formations, the chronology of several hominid sites...

The occurrence and evolution of anatomically modern Homo sapiens have been the subjects of controversy between exponents of two major competing hypotheses: multiregional origins versus “recent out of Africa”. This paper makes a brief review on the technical advances in Quaternary geochronology achieved during the past over 20 years and their impacts on the timescale of recent human evolution. Based on the U-series dating of intercalated speleothem formations, the chronology of several hominid sites in southern China, including the cave of Liujiang hominid, have been studied. The results show that these sites are much older than the previously estimated age of 20~30 ka. The appearance of modern Homo sapiens in southern China may be an event occured as early as that in West Asia and South Africa. The so-called “temporal gap” of human presence in China between 40 and 100 ka is most likely nothing but an artifact caused by systematic errors of the dating methods. The above chronological evidence does not support the “recent out of Africahypothesis. Further multidisciplinary studies on hominid sites in China may provide important evidence for resolving the hotly debated issues concerning the origin of modern humans.

现代人类起源的时间和地点是当前古人类学研究和争议的热点。文中评述了 2 0多年来第四纪测年技术取得的进展及其对现代人类起源研究的影响。基于新生碳酸盐岩铀系测年 ,研究了中国南方柳江人洞等多个晚期人类化石地点的年代 ,结果远大于原认为的 2 0~ 30ka。晚期智人在中国出现的时间很可能不晚于西亚和南非 ,中国 4 0~ 1 0 0ka间人类化石的“缺环” ,很可能只是测年技术系统误差造成的假象。上述年代学新证据不支持中国现代人类全部来自非洲的假说。对岩溶洞穴遗址进一步的综合研究 ,有可能为破解有关现代人类起源的诸多疑点提供重要的以至一锤定音的证据

The human origin of Africa Hypothesis refers to His first going out of Africa and His second going out of Africa. The first time refers to Homo erectus' going out of Africa, which can explain why Africans show great genetic variation but cannot deduce that all human languages originated in Africa. The second time refers to the African Archaic Homo sapiens' going out of Africa to replace the Asian Archaic Homo sapiens. Even if the second hypothesis was a fact, mono-origin...

The human origin of Africa Hypothesis refers to His first going out of Africa and His second going out of Africa. The first time refers to Homo erectus' going out of Africa, which can explain why Africans show great genetic variation but cannot deduce that all human languages originated in Africa. The second time refers to the African Archaic Homo sapiens' going out of Africa to replace the Asian Archaic Homo sapiens. Even if the second hypothesis was a fact, mono-origin and multi-origin are both possible for the origin of human language, while the latter is more possible. At present, the great genetic variation of Africans itself cannot be confirmed as the result of His first going out of Africa or His second going out of Africa.

人类起源非洲假说需要分成两种情况:第一次走出非洲和第二次走出非洲。第一次走出非洲是直立人或非语言人走出非洲。这个结论本身就能解释为什么非洲人遗传变异大,但不能推出人类语言都起源于非洲。第二次走出非洲是早期智人走出非洲,这些智人取代了亚洲的早期智人。即使第二次走出非洲的假说成立,人类语言的起源仍然存在一元说和多元说两种可能,多元说可能性更大。目前非洲人遗传变异大这一观察数据本身不能区分是第一次走出非洲的结果还是第二次走出非洲的结果。

 
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