论文部分内容阅读
人类染色体脆性位点(fragile site简称fra)是一类不同于基因突变和染色体畸变的变异。1986年我们发现一个脆性X综合征家系。
Human chromosome fragile site (fragile site referred to as fra) is a type of mutation is different from the mutation and chromosomal aberrations. In 1986 we found a Fragile X syndrome pedigree.