Y-STR loci never occur recombination during meiosis, and they can be passed to their offspring steadily, so they are meaningful markers to identify paternity, male sibling and male collateral relatives.
Y-特异区序列在减数分裂中不会出现重组交换，能稳定的从亲代连锁传递给子代，因而在父权鉴定、同胞兄弟鉴定、男性旁系鉴定中有着重要的意义。
参考来源 - STR在同胞鉴定中的应用及河南汉族7个Y