Biologists can infer how species are related evolutionarily by comparing DNAsequences for the same genes in different species.
生物学家可以通过比较不同物种中相同基因的 DNA 序列来推断物种之间的进化关系。
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Barcoding is a technique in which one or more short gene sequences, taken from a well-characterized portion of the genome, are used to identify a species through DNA analysis.
测序是一种技术，它是从具有明确特征的基因组提取的一个或多个短基因序列，并通过 DNA 分析来识别一个物种。
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Species with similar DNAsequences for these genes are generally more closely related to each other than to species with less-similar DNAsequences.