1. The twins are isogenic, meaning they have the same genetic makeup.
这对双胞胎具有相同的基因型，也就是说他们的基因构成相同。

2. The isogenic strains of bacteria were used in the experiment to eliminate genetic variability.
实验中使用了具有相同基因型的细菌菌株，以消除基因变异性。

3. The researchers conducted isogenic studies to investigate the impact of specific genes on disease susceptibility.
研究人员进行了同基因型的研究，以研究特定基因对疾病易感性的影响。