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Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
admin
2019-05-25
20
问题
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has【B2】______.
The study is a genome-wide analysis conducted【B3】______1,932 unique subjects which【B4】______pairs of unrelated friends and unrelated strangers. The same people were used in both【B5】______.
While 1% may seem【B6】______, it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says, "Most people do not even【B7】______their fourth cousins but somehow manage to select as friends the people who【B8】______our kin."
The study【B9】______found that the genes for smell were something shared in friends but not genes for immunity. Why this similarity exists in smell genes is difficult to explain, for now.【B10】______, as the team suggests, it draws us to similar environments but there is more【B11】______it. There could be many mechanisms working together that【B12】______us in choosing genetically similar friends【B13】______"functional kinship" of being friends with【B14】______!
One of the remarkable findings of the study was that the similar genes seem to be evolving【B15】______than other genes. Studying this could help【B16】______why human evolution picked pace in the last 30,000 years, with social environment being a major【B17】______factor.
The findings do not simply corroborate people’ s【B18】______to befriend those of similar【B19】______backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to【B20】______that all subjects, friends and strangers, were taken from the same population.
【B6】
选项
A、insignificant
B、unexpected
C、unreliable
D、incredible
答案
A
解析
考查形容词辨析。本句意为“尽管这1%看起来似乎______,但是遗传学家可不这么认为”。空前后形成对比转折的逻辑关系,而从后文列举的例子中可知遗传学家詹姆斯-福勒对这1%基因的态度是肯定的,insignificant“无关紧要的”符合题意,故答案为A项。unexpected“出乎意料的”,unreliable“不可靠的”,incredible“难以置信的”均不符合语境。
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0
考研英语一
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