首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Mothers interfere with their children’s lives even more than most offspring realize. That they nag about eating habits is well k
Mothers interfere with their children’s lives even more than most offspring realize. That they nag about eating habits is well k
admin
2015-05-24
116
问题
Mothers interfere with their children’s lives even more than most offspring realize. That they nag about eating habits is well known. What goes unnoticed is that mothers leave cells inside their children’s bodies, which may help with repairs when a child’s own cells go disorderly.
This form of maternal interference is called microchimerism—the presenceof a small number of cells that originate from another individual and therefore genetically distinct from the cells of the host individual. A mother’s cells can endure until a child reaches adulthood and perhaps throughout life. But scientists do not know exactly how common microchimerism is. It is detected more often in people with autoimmune conditions, which has led to the suggestion that the maternal cells could trigger those diseases. But healthy people have them too, seemingly with no ill effects.
Lee Nelson, of the University of Washington, suspects that everybody has a few maternal cells. Her most recent work argues that, at least in some cases, they help rather than harm. Dr Nelson and her colleagues took blood samples from three groups of young volunteers and their mothers. The first group comprised 94 young volunteers who had type 1 diabetes; the second were 54 of their healthy siblings (brothers or sisters); and a further 24 were children without diabetes who were not related to anyone else in the study. The researchers then compared DNA from the mothers and their children.
Because mothers pass copies of about half their genes to their children, some genes in any child-mother pairs will be unique to the mother—those that the child has not inherited from her. Others-versions of genes that came from dad—will be unique to the child. Dr Nelson used the uniquely maternal genes to find mothers’ cells in the volunteers’ blood. The technique found maternal cells in about half the diabetics’ samples, but in only about one-third of the healthy siblings’ samples and in less than one-fifth of those from the unrelated volunteers. Moreover, the microchimerism was not only more common but also more pronounced in diabetics.
Dr Nelson also looked for signs that the maternal cells had caused the diabetes but found no evidence. So, contrary to established opinion, she believes maternal cells can do children good. These cells may help any bodily organ work better, she says, apart from the reproductive kind. Mothers’ protective interference goes on—seen and unseen.
What is the author’s attitude towards maternal interference?
选项
A、Supportive.
B、Biased.
C、Impartial.
D、Ironic.
答案
C
解析
观点态度题。通读全文可知作者并未对母性干预做出任何主观性的评论,而文章最后一句“无论人们注意到与否,母亲们的保护性干预始终存在”也印证了这点,因此C项”中立的”正确。
转载请注明原文地址:https://kaotiyun.com/show/zN74777K
0
考研英语一
相关试题推荐
EducationChangesoftheKindergartenChildrenWehavetwosetsoftwinswhoareinfourthgradeandkindergartenataweli-
EducationChangesoftheKindergartenChildrenWehavetwosetsoftwinswhoareinfourthgradeandkindergartenataweli-
Youhavevisitedaschoolforchildrenofpeasantworkersandfoundteachingenvironmentthereisverybad.Youwillwritealet
Writeanessaywiththetitleofwhoistocarethechildren,andyouressayshouldbebasedonthefollowingoutline,youshoul
TheStudents’UnionoftheSchoolofEconomiesisgoingtohaveaseminaronthephenomenonofwastefulhabitsoncampus.Youa
Itisdecidedthatyouaregoingtohaveaseminaronthephenomenonofwastefulhabitsoncampus.Pleasewriteamemorandumto
Aschildhood-obesityratesskyrocket,doctorsareseeinganalarmingriseinacostlydiseaseonceunheardofinchildren;type
Aschildhood-obesityratesskyrocket,doctorsareseeinganalarmingriseinacostlydiseaseonceunheardofinchildren;type
随机试题
某注水井测得的目前地层压力为10.3MPa,油层中部深度为878.2m,井口注水压力为11.0MPa,求注水压差。
压力越低越有利于裂解反应的进行。()
出生6个月男婴,右上腹肿瘤,高低不平,固定而质硬,未超过中线,但右侧肾门淋巴结肿大明显。AFP8μg/ml,24小时尿VMA65mg/24h。无远处转移发现。考虑诊断为
最可能诊断为经系统正规用抗生素治疗8个月,病人症状消失,尿常规:蛋白(-),RBC0~1/HP,WBC 0~2/HP。细菌培养仍然阳性,下一步如何处理最佳
儿童趋向于要自己刷牙,需要父母时常督促和帮助培养儿童建立口腔卫生习惯,掌握刷牙方法,有效地刷牙
下列哪项不是急性胰腺炎的病因
导致崩漏的常见病因病机是()
对患儿进行心肺复苏前,应迅速确定有无()
AreconstructionofanancienttreefromoneofEarth’sfirstforestsrevealsthattheplantsweretoppedwithfronds(蕨类植树物的叶子)
Manybirdsandinsectscanbuild______neststoprovideshelterfortheiryoung.
最新回复
(
0
)