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
外语
The Discovery of Genes Perhaps you may have wondered why you look like your father or mother, while your sister looks like an
The Discovery of Genes Perhaps you may have wondered why you look like your father or mother, while your sister looks like an
admin
2009-06-15
96
问题
The Discovery of Genes
Perhaps you may have wondered why you look like your father or mother, while your sister looks like an aunt or even one of your grandparents. The way you look, talk and move and how tall you will grow depend mostly upon the very small particles called genes, which are found in the cells of your body. You get these genes from your parents. Each time they reproduce (生育) they pass along a set of genes. But each new set may be a little different from the previous sets. So when parents have a number of children, they will find that each child looks somewhat like themselves but with individual features too.
In the past nobody really understood why members of the same family resembled each other. All through the eighteenth and nineteenth centuries many scientists tried to find out how the features of living things were passed on to the next generation. Then in the 1860s one man succeeded in finding out the answer. He was Gregor Mendal, an Austrian who was very interested in growing plants.
He experimented with pea (豌豆) plants. He found that there was something in the parent plant that gave the offspring (后代) certain features, such as tallness or shortness. This "something" is now called genes. He also discovered that of all the features of a plant which were passed on to another generation, some were stronger than others. In such a case the stronger features would be dominant in the new plants. He proved this by crossing a purple-flowered plant with a white-flowered plant--the first new generation all had purple flowers. But when seeds from the new purple-flowered plants grew up, one plant of this generation was white. So although the white features did not show in the plants of the first generation, it had been there all the time.
Mendal published his findings in 1866, but it was only in 1900 that the importance of his work was recognized. Scientists realized that his theories on heredity (遗传) could also be applied to all forms of life, including humans.
选项
A、completely on his own genes.
B、largely on his parents’ genes.
C、mostly on his brothers’ genes.
D、mainly on his sisters’ genes.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/Hl1d777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Whatdoyouthinkofwhenyouhearthewordmotherhood?Ifyouarelikemostpeople,youassociatemotherhoodwithanumberofp
Whatwillitmeantoknowthecompletehumangenome.EricLanderofMIT’sWhiteheadInstitutecomparesittothediscoveryofth
1.Onanaverageofsixtimesaday,adoctorinHollandpractices"active"euthanasia:intentionallyadministeringalethaldru
1.Onanaverageofsixtimesaday,adoctorinHollandpractices"active"euthanasia:intentionallyadministeringalethaldru
1.Onanaverageofsixtimesaday,adoctorinHollandpractices"active"euthanasia:intentionallyadministeringalethaldru
1.Peoplehavewonderedforalongtimehowtheirpersonalitiesandbehaviorsareformed.It’snoteasytoexplainwhyoneperso
CONVERSATION2(Questions5-8)Thepatient’sname:【L5】______JohnsonThedoctor’sname:【L6】______Appointmenttime:at【L7】______a
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
随机试题
Whatwasthenewkindofpowerintheearly1800s?Itwas____________
下列属于一次文献的是()
下列骨折出现骨折的专有体征的是
血液由左心室输出,经主动脉及分支分布到全身组织,由毛细血管和静脉回到右心房,此循环称为()
产后第三天突然出现畏寒、高热,体温40℃,伴有恶心、呕吐,下腹剧痛,压痛、反跳痛、腹肌紧张感明显。最可能的诊断是
我国第六次人口普查的标准时间是2010年11月1日零点。以下应计算在人口总数内的有()。
下列关于客户保证金的表述,正确的是()。[2015年3月真题]
①群岛的总面积约为6.1万平方千米,和爱尔兰差不多大②斯瓦尔巴群岛位于北大西洋和北冰洋的交界处,被公认为是北冰洋的门户,同时也是前往北极点的出发地③斯瓦尔巴群岛中面积最大的岛名叫“斯匹茨卑尔根”,形状极不规则,边缘处布满峡湾④海水顺着峡湾倒灌进来,最
ReadthearticlebelowaboutGDP.Inmostofthelines34~45thereisoneextraword.Itiseithergrammaticallyincorrectordo
Thereareanumberoffarmersnowwhenselldownstockandclosedownfordryperiodsbutthisrequiresacertainequitylevel.
最新回复
(
0
)