dizygotic

Conclusion: The twin girls originate from dizygotic and the extra chromosome 21 of the elder sister is from nondisjunction during the first meiotic division of the mother.

结论孪生姐妹为异卵孪生，孪生姐姐额外的21号染色体来自于母亲第1次减数分裂不分离。

The concordance is around 20 % for dizygotic twins.

该一致性约为20%,异卵双胞胎.

However, there are still more genes to be found that influence spontaneous dizygotic twinning.

不过，目前还有很多与自发性异卵双胞胎有关的基因有待发现。

The two embryos that dizygotic, not genetically identical. Therefore, the twins are not identical.

两个胚胎来自双卵, 遗传学上不一样, 所以这种双胎是不一样的.

Siblings and dizygotic twins share only 50 % of their segregating genes.

同卵双生双胞胎和双卵双生双胞胎分享仅50%的基因.

Siblings and dizygotic twins share only 50% of their segregating genes.

同卵双生双胞胎和双卵双生双胞胎分享仅50%的基因。