题目

已知控制双眼皮的基因（D）是显性基因，控制单眼皮的基因（d）是隐性基因。现有一个家庭，父亲的基因组成是Dd，请根据如图所示的遗传图解分析回答问题： （1） 人的双眼皮和单眼皮是一对性状。 （2） 父亲的性状是，母亲的基因组成是。 （3） 该夫妇生了一个女儿小丽是单眼皮，而父亲是双眼皮，这种现象在遗传学上称为。如果这对夫妇再生一个小孩，那么这个小孩是单眼皮的概率是。I used to believe in the American Dream, which meant a job, a mortgage (按揭), credit cards, success. I wanted it and worked toward it like everyone else, all of us 1 chasing the same thing.One year, through a series of unhappy events, it all fell2. I found myself homeless and alone. I had my truck and $56. I 3 the countryside for some place I could rent for the 4 possible amount. I came upon a shabby house four miles up a winding mountain road 5 the Potomac River in West Virginia. It was 6, full of broken glass and rubbish. I found the owner ,rented it, and 7 a corner to camp in.The locals knew nothing about me, 8 slowly, they started teaching me the 9of being a neighbor. They dropped off blankets, candles, and tools, and began 10to chat. They started to teach me a belief in a 11American Dream—not the one of individual achievement but of 12.What I had believed in, all those things I thought were 13 for a civilized life, were nonexistent in this place. 14 on the mountain, my most valuable possessions were my 15 with my neighbors. Four years later, I moved back into 16. I saw many people were having a really hard time, 17 their jobs and homes. I managed to rent a big enough house to 18 a handful of people .There are four of us now in the house, but over time I’ve had nine people come in and move on to other places. We’d all be in 19 if we hadn’t banded together.（团结起来）The American Dream I believe in now is a shared one. It’s not so much about what I can get for myself; it’s about 20 we can all get by together.1.A.equallyB.separatelyC.violentlyD.naturally2.A.offB.overC.apartD.out3.A.searchedB.leftC.touredD.crossed4.A.cheapestB.largestC.fairestD.fullest5.A.atB.throughC.overD.round6.A.occupiedB.abandonedC.emptiedD.robbed7.A.turnedB.approachedC.cutD.cleared8.A.butB.althoughC.otherwiseD.for9.A.benefitB.lessonC.natureD.art10.A.lookingB.stayingC.swingingD.turning11.A.wildB.realC.differentD.remote12.A.neighborlinessB.happinessC.friendlinessD.kindness13.A.uniqueB.expensiveC.rareD.necessary14.A.DownB.UpC.DeepD.Along15.A.cooperationB.relationshipsC.satisfactionD.appointments16.A.realityB.societyC.townD.life17.A.creatingB.losingC.quittingD.offering18.A.put inB.turn inC.take inD.get in19.A.yardsB.sheltersC.campsD.cottages20.A.whenB.whatC.whetherD.how