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A DNA segment is identical by state (IBS) in two or more individuals if they have identical nucleotide sequences in this segment. An IBS segment is identical by descent (IBD) in two or more individuals if they have inherited it from a common ancestor without recombination, that is, the segment has the same ancestral origin in these individuals. DNA segments that are IBD are IBS per definition, but segments that are not IBD can still be IBS due to the same mutations in different individuals or recombinations that do not alter the segment.

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  • Idéntico por descendencia (es)
  • Identity by descent (en)
  • 기원에 따른 일치 (ko)
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  • Un segmento de ADN es idéntico por estado (IBS) en dos o más individuos si tienen secuencias de nucleótidos idénticas en este segmento. Un segmento de IBS es idéntico por descendencia (IBD, del inglés identical by descent) en dos o más individuos si lo han heredado de un ancestro común sin recombinación, es decir, el segmento tiene el mismo origen ancestral en estos individuos. Los segmentos de ADN que son IBD son IBS por definición, pero los segmentos que no son IBD aún pueden ser IBS debido a las mismas mutaciones en diferentes individuos o recombinaciones que no alteran el segmento. (es)
  • A DNA segment is identical by state (IBS) in two or more individuals if they have identical nucleotide sequences in this segment. An IBS segment is identical by descent (IBD) in two or more individuals if they have inherited it from a common ancestor without recombination, that is, the segment has the same ancestral origin in these individuals. DNA segments that are IBD are IBS per definition, but segments that are not IBD can still be IBS due to the same mutations in different individuals or recombinations that do not alter the segment. (en)
  • 둘 이상의 개체에서 어떤 DNA 구역이 똑같은 뉴클레오타이드 서열을 가질 때, 그 DNA 구역은 상태에 따라 일치(identical by state, IBS)한다고 한다. 둘 이상의 개체가 공통 조상으로부터 재조합 없이 IBS 구역을 물려받은 경우, 즉 이들 개체에서 IBS인 DNA 구역의 조상 기원이 똑같을 경우 그 DNA 구역을 기원에 따라 일치(identical by descent, IBD)한다고 한다. IBD인 DNA 구역은 정의에 따라 IBS가 된다. 하지만 다른 개체에서 나타난 똑같은 돌연변이나 그 구역을 바꾸지 않는 재조합에 의해 IBD가 아닌 DNA 구역도 IBS가 될 수 있다. (ko)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/IBD_segment_detected_by_HapFABIA_in_1000Genomes.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pedigree,_recombination_and_resulting_IBD_segments,_schematic_representation.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pedigree,_recombination_and_resulting_IBD_segments,_schematic_representation_modified.png
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