题目

某种昆虫眼色的野生型和朱红色、野生型和棕色分别由等位基因A、a和B、b控制，两对基因分别位于两对同源染色体上。为研究其遗传机制，进行了杂交实验，结果见下表：回答下列问题：（1）野生型和朱红眼的遗传方式为______，判断的依据是______。（2）杂交组合丙中亲本的基因型分别为______和______，F1中出现白眼雄性个体的原因是______。（3）以杂交组合丙F1中的白眼雄性个体与杂交组合乙中的雌性亲本进行杂交，用遗传图解表示该过程____。A little boy was visiting his grandparents on their farm.He was given a slingshot (弹弓) to play with out in the woods.He 1 in the woods, but he could never hit anything.Getting a little 2, he headed back for dinner.As he was 3back he saw Grandma's pet 4.Just out of impulse (冲动), he let the slingshot 5,hit the duck right in the head and killed it.He was shocked and 6.In a panic, he hid the 7duck in the wood pile, only to see his sister watching! Sally had seen it all, but she said 8.After lunch the next day Grandma said, "Sally, let's wash the 9." But Sally said, "Grandma, Johnny told me he10 to help in the kitchen." Then she11to him, "Remember the duck?" So Johnny washed the dishes.Later that day, Grandpa asked if the children wanted to go fishing.Before they left, Grandma said, "I'm sorry but I 12Sally to help me make supper."Sally just smiled and said, "Well, you needn't worry about it 13Johnny told me he wanted to help."She whispered again, "Remember the duck?" So Sally went 14and Johnny stayed to help.After several days of doing both his 15and Sally's, he finally couldn't 16it any longer.He came to Grandma and admitted that he had 17the duck.Grandma knelt down(蹲下), gave him a 18, and said, "Sweetheart, I know.You see, I was standing at the window and I saw the 19thing, but because I love you.I forgave you.I was just wondering how long you would let Sally make a 20of you.If you make a mistake, just be brave to admit to it and promise not to make it again.In that way, everyone will forgive you."1.A.workedB.practicedC.climbedD.searched2.A.pleasedB.worriedC.puzzledD.discouraged3.A.turningB.lookingC.walkingD.falling4.A.dogB.duckC.catD.rabbit5.A.riseB.leaveC.stopD.fly6.A.sadB.luckyC.angryD.excited7.A.happyB.hungryC.fatD.dead8.A.anythingB.somethingC.nothingD.everything9.A.clothesB.dishesC.handsD.floors10.A.wantedB.managedC.triedD.willing11.A.shoutedB.explainedC.talkedD.whispered12.A.commandB.requestC.needD.allow13.A.untilB.becauseC.whileD.although14.A.fishingB.swimmingC.climbingD.shopping15.A.exerciseB.lessonC.problemD.housework16.A.acceptB.affordC.stand(忍受)D.support17.A.hurtB.killedC.hiddenD.wounded18.A.kissB.surpriseC.giftD.suggestion19.A.strangeB.terribleC.seriousD.whole20.A.enemyB.winnerC.slaveD.leader