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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Scientists ... hope that being able to study the entire genome sequence will help them understand how the genome as a whole works — how genes work together to direct the growth, development and maintenance of an entire organism. … The whole genome [cannot] be sequenced all at once because available methods of DNA [deoxyribonucleic acid] sequencing can only handle short stretches of DNA at a time. … scientists must break the genome into small pieces, sequence the pieces, and then reassemble them in the proper order to arrive at the sequence of the whole genome.  4, record 1, English, - whole%20genome%20sequence

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Electrophoretic separation of allelic variants of enzymes (allozymes) has been used to study the population genetics of a wide variety of species for many years. Although electrophoretically-evident variation is only a small portion of the genetic variation of a gene, many enzymes have been shown to exhibit high levels of allozymic variation. More recently, genetic variation at the molecular level [i.e., structural traits of nucleic acids such as DNA (deoxyribonucleic acid)] has been used in population genetic studies. A variety of technical approaches have been used to assay molecular variation for population genetic studies.  2, record 2, English, - genetic%20variation

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Les chercheurs de l'unité «Plasticité et expression des génomes microbiens» ont effectué l'analyse moléculaire de la variation génétique de lignées de la bactérie Escherichia coli. Ils disposent aujourd’hui, grâce à une équipe du Michigan State University, d’une collection bactérienne de type paléontologique qui retrace des phénomènes d’adaptation à une contrainte environnementale. Ce premier résultat génomique dans une bactérie dont la séquence complète est connue, ouvre la voie à une nouvelle approche des sciences de l'évolution qui pour l'instant est centrée sur une bactérie à croissance rapide.  3, record 2, French, - variation%20g%C3%A9n%C3%A9tique

Record 2,  Textual support,  Spanish