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在正常生育男性的睾丸中存在着两种配子——含有Ｘ染色体的Ｘ精子和含有Ｙ染色体的Ｙ精子；而正常生育女性的卵巢中只有一种配子——携带有Ｘ染色体的卵子。当来自父方的Ｘ精子和来自母方的含Ｘ染色体的卵子结合后，产生的后代为女性（４６，ＸＸ）；而当来自父方的Ｙ精子...
There are two gametes in the testes of a normal-born male: the X-containing X-sperm and the Y-sperm containing the Y-chromosome; whereas the normal-born female has only one gamete in the ovary - the egg carrying the X-chromosome. When the X-sperm from the father and the X-chromosome-containing egg from the mother combine, the resulting offspring is female (46, XX); and when the Y sperm from the father ...