谢谢解惑。还有一个问题，一家的小天鹅被一对一对领走，长期下来近亲遗传会不会出现基因问题？

来源: hahumiaomiao 于 2021-09-18 13:05:28 [旧帖] [给我悄悄话] 本文已被阅读：次

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