大佬分析一下，这是出错了还是我理解有问题

{"result":[{"race_desc":"\u4e2d\u534e\u6c11\u65cf","race_en":"chinese_nation","race_probality":"0.922779","area":[{"block":"chinese_nation","race_desc":"\u5357\u65b9\u6c49\u65cf","race_en":"han_southern","race_probality":"0.375135"},{"block":"chinese_nation","race_desc":"\u5317\u65b9\u6c49\u65cf","race_en":"han_northern","race_probality":"0.322553"},{"block":"chinese_nation","race_desc":"\u7eb3\u897f\/\u5f5d\u65cf","race_en":"ny","race_probality":"0.168532"},{"block":"chinese_nation","race_desc":"\u85cf\u65cf","race_en":"tibetan","race_probality":"0.048481"},{"block":"chinese_nation","race_desc":"\u7572\u65cf","race_en":"she","race_probality":"0.008008"},{"block":"chinese_nation","race_desc":"\u5176\u4ed6","race_en":"other","race_probality":"0.0002"}]},{"race_desc":"\u4e1c\u5317\u4e9a","race_en":"ne_asian","race_probality":"0.076951","area":[{"block":"ne_asian","race_desc":"\u65e5\u672c","race_en":"japanese","race_probality":"0.069524"},{"block":"ne_asian","race_desc":"\u97e9\u56fd","race_en":"korean","race_probality":"0.007417"}]},{"race_desc":"\u5176\u4ed6","race_en":"other","race_probality":"0.0004","area":[]}],"case_id":"ANCESTRY","prefix":null,"description":"\u7956\u6e90\u5206\u6790","color":null,"detail_url":"\/report2\/ancestry\/"}

看结果，16%的少数名族基因，这个占比应该不是偶然的基因相似了吧，然后看时间线，也就是说我曾祖父那一代应该有个少数民族？但我问了俺爹地和妈咪，他们表示，没有！
这是分析不准确还是我理解错误，这方面知识比较少，请各位大佬们解惑。