Vaughan L, Schofield W, Ennis S
Faculty of Veterinary Medicine, University College Dublin, Ballsbridge, Ireland.
Theriogenology. 2001 Mar 15;55(5):1051-7. doi: 10.1016/s0093-691x(01)00465-4.
A three year old pony with sexually ambiguous external genitalia was found to have a normal female karyotype (64, XX) and bilateral inguinal testes. The PCR analysis of blood samples revealed the absence of the Y chromosome sequences SRY, eTSPY and ZFY. No Y chromosome sequences were identified in DNA extracted from the gonads. The mechanism whereby XX sex reversal occurs in the absence of SRY is unknown.
一匹三岁的小马，其外生殖器存在性征模糊的情况，经检查发现具有正常的雌性核型（64, XX）以及双侧腹股沟睾丸。对血液样本进行的聚合酶链反应（PCR）分析显示，不存在Y染色体序列SRY、eTSPY和ZFY。从性腺提取的DNA中未鉴定出Y染色体序列。在没有SRY的情况下发生XX性反转的机制尚不清楚。
