在法医鉴定中 ,ＤＮＡ指纹技术主要包括 3个步骤。从犯罪点收集生物学证据如头发 ,血迹等 ;分析这些线索的ＤＮＡ序列 ;将从犯罪嫌疑人处取来的样本与这些线索进行比较。如果两者相配 ,就可以断定嫌疑人在案发现场。因为在染色体中碱基对很多 ,从细胞提取的ＤＮＡ链要用一定的 Forensic identification, DNA fingerprinting consists of three steps. Collect biological evidence from crime points such as hair, blood stains, etc .; analyze DNA sequences for these clues; compare samples taken from suspects with these clues. If the two match, you can conclude that the suspect in the scene. Because of the large number of base pairs in the chromosome, DNA strands extracted from the cells are used to a certain extent