另一个应用是建立人类疾病模型，因为多数疾病是由于基因表达失调的引起的。
Another application could be to create models for human diseases, for many of them are caused by a disorder of gene expression.
几年前，人类的基因曾被添加到老鼠身上，以创建唐氏症模型，让科学家研究这种疾病如何演化，这可能带来有潜力的治疗方法。
Several years ago, human genes were added to a mouse to create a model of Down's syndrome for scientists to study how the disease evolves, which could lead to potential treatments.
狗的基因组序列能帮助研究人员更快的找到引起人类疾病的基因，因而这种动物是比较有用的疾病模型。
And a dog genome sequence has made the animals an even more useful model by quickening the search for disease-causing genes.
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