In fact, different dog breeds are the result of breeding relatives with similar desirable traits, like coat color, height, or snout size.

事实上，不同的狗种都是近亲繁殖的结果，这些近亲都具有相似的理想特征，比如皮毛颜色、身高或鼻子大小。

Because these cells develop into many different tissues and cell lineages, changes in them might explain why many domestic animals share a group of traits like floppy ears and various coat colors.

由于这些细胞发育成许多不同的组织和细胞谱系，它们的变化或许可以解释为什么许多家养动物具有一组特征， 如松软的耳朵和不同的毛色。