Left-handedness is ___. A.a thing that is cultivatedB.a thing that occurs by pure chanceC.a thing of genetic inheritanceD.a thing that occurs more in prominent figures 相关知识点: 试题来源: 解析 B [解析] 本题中,A不正确,从全文可知左撇子是先天的;D不对,它在所有的社会、人种和性...
C. genetic factors. D. the E. xample of the F. riends. 相关知识点: 试题来源: 解析 C 正确答案:C解析:细节题。短文开头说到没人知道为什么人分左撇子和右撇子,说是由父母的教育方式造成的是不对的。换句话来说,人一生下来就已经决定是左撇子还是右撇子了,即决定人是左撇子还是右撇子的是自身的...
Such studies have produced the surprising result that regardless of the index used to measure handedness, with increasing age, the number of lefthanders diminishes markedly. Several genetic models have been proposed to explain sinistrality as an inherited trait. Simple single gene theories in which ...
72.A 本题考查前后句子的联系,根据前文Since scientists have noticed that left-handedness tends to run in families,it's assumed that left-handedness has a genetic(基因的) component to it.可知左撇子的形成有基因的原因,也就是说左撇子是天生如此,故选A. 73.C 本题考查前后句子的联系,根据前文Histori...
【小题1】.T he answer to it remains a bit of a mystery.Since scientists have noticed that left-handedness tends to run in families, it's assumed that left-handedness has a genetic(基因的) component to it. 【小题2】. In fact, identical twins, who share the same genes, can ...
The world is designed for right-handed people, but a tenth of the population prefer the left. 【 1 】 The answer to it remains a bit of a mystery. Since scientists have noticed that left-handedness tends to run in families, it’s assumed that left-handedness has a genetic( 基因的 ...
For example, most right-handed tennis players have little experience of playing left-handers, but left-handers have plenty of experience of playing right-handers. Whatever the advantages are, handedness seems to be genetic. With 10 percent of people preferring their left hand, there must be ...
re walkingdownthe staircase. If you’re turning to the right as you descend, the DNA structure is right-handed; if turning to the left, it’s left-handed. In the image shown earlier, the DNA molecule on the right is a right-handed double helix, while its mirror image is left-handed...
Since scientists have noticed that left-handednesstends to run in families, it's assumed that left-handedness has a genetic(基因的) component to work.2 In fact, identical twins, who share the same genes, can sometimes prefer to use different hands.There are also plenty of theories on what...
Since scientists have noticed that left-handednesstends to run in families, it's assumed that left-handedness has a genetic(基因的) component to work.2 In fact, identical twins, who share the same genes, can sometimes prefer to use different hands.There are also plenty of theories on what...