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一、什么是DNA指纹每个人体细胞内含有23对染色体,它们大小各异。遗传信息贮存于染色体内的DNA分子中。DNA中脱氧核苷酸排列方式叫序列,即一级结构。DNA序列中存在三种类型:单拷贝序列、中等程度重复序列和高度重复序列。重复序列就是一种序列在DNA分子中重复出现几百次、几千次、几万次甚
First, what is DNA fingerprinting Each human somatic cell contains 23 pairs of chromosomes, they are different sizes. Genetic information is stored in chromosomal DNA molecules. DNA deoxynucleotide arrangement is called sequence, that is, the primary structure. There are three types of DNA sequences: single-copy sequences, moderately repeated sequences, and highly repetitive sequences. Repeats are sequences that repeat hundreds, thousands, tens of thousands times in a DNA molecule