至少,有两个关于被收养孩子的研究表明,孩子是否会发展成为口吃者,其可能性,收养者是口吃者并不比非口吃者大。
To discover which genes might be responsible, Dr Drayna looked at 44 Pakistani families.
为了发现哪种基因与引发口吃有关,德雷纳博士对44个巴基斯坦家庭进行了调查。
Marriage between cousins is common in Pakistan, and such inbreeding leads to a highincidence of genetic disorders.
近亲结婚在巴基斯坦很普遍,而这种近亲交配引发遗传性疾病的发病率很高。
Dr Drayna s analysis suggests that stuttering is linked to mutation of a gene calledGNPTABa finding confirmed when the same mutation was subsequently discovered in anumber of stutterers from Pakistan and India who were unrelated to the original group offamilies.
德雷纳博士的分析表明口吃与一种叫做GNPTAB的基因突变有关随后,在巴基斯坦和印度非近亲结婚的家庭中发现了许多口吃者也有类似的突变时,这个发现得到了证实。
In January Dr Drayna and his colleagues published a paper in the Journal of Human Geneticstracing the responsible mutation back almost 600 generations, to a common ancestor whowould have lived around 14,000 years ago.
1月,德雷纳博士和他的同事在《人类遗传学杂志》上发表了一篇论文,追踪了约600代人中发生过此种突变的人,他们的祖先是同一个人,生活在约14,000年前。
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