[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fwc-YSnkuWl4NOQhNjtmYyhkv1lkRckSuece8mmUk6SE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":27,"type":28},[],"2024-02-28 15:50:40",132605603,[8,9,10,11],"互补作用","积加作用","抑制作用","重叠作用",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"5ee1b8ec9eb551dd09357c72f2ea24cd","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F010123a33294ef373b83f333c35b5301.jpg","遗传学-2024（生物技术必修）","89b3bf57957d4143a051837fd22fdfbf","第4章课前自测","两纯系亲本进行杂交,得到的子一代F1自交,得到子二代F2个体中,性状分离比为9:7,这是非等位基因间的什么遗传现象()",[21,29,35,44,47,56,65,74,83,89],{"answer":22,"createTime":5,"id":23,"options":24,"question":26,"source":27,"type":28},[],132605600,[11,25,10,9],"隐性上位","南瓜形状遗传受两对非等位基因的决定,两种圆球形纯系品种亲本杂交,得到F1,性状为扁盘形状,F1代自交,得到扁盘形状、球形和长圆形三种形状的南瓜,且比例为9:6:1,问这是什么遗传现象?()","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":34,"source":27,"type":28},[],132605601,[33,9,25,10],"显性上位","两对独立遗传的非等位基因决定的性状遗传中,如果F2代出现9:3:4的性状分离比,其遗传方式为()",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":27,"type":28},[],132605602,[39,40,41,42],"限性遗传","从性遗传","伴性遗传","细胞质遗传","绵羊角的遗传中,有角(HH)和无角(hh)交配得到子一代F1(Hh),雄性个体表现为有角,雌性个体表现为无角,其遗传方式为()",{"answer":45,"createTime":5,"id":6,"options":46,"question":19,"source":27,"type":28},[],[8,9,10,11],{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],132605604,[51,52,53,54],"完全显性","共显性","不完全显性","超显性","一对相对性状同时在子一代F1上表现出来,其显性表现类型为()",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":27,"type":28},[],132605605,[60,61,62,63],"1红:2沙:1白","3红:1白","1红:3白","1红:1白","牛的皮毛颜色是不完全显性,两个亲本:红牛和白牛交配,子一代为沙毛牛,沙毛牛近亲繁殖,后代表型及其比例为()",{"answer":66,"createTime":5,"id":67,"options":68,"question":73,"source":27,"type":28},[],132605606,[69,70,71,72],"29\u002F32","3\u002F32","3\u002F16","9\u002F16","三对非等位基因是完全显性,且无连锁,无互作,AaBbCc &times; AabbCc后代中与A_B_cc表现型不同的个体所占比例为()",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":27,"type":28},[],132605607,[78,79,80,81],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85cf8459e8eedea6417df9371aa30049.webp\">1\u002F8","1\u002F4","1\u002F2","1\u002F16","豌豆红花(C)对白花为显性,种子圆粒(R)对皱粒(r)为显性,两对非等位基因是独立遗传的,无互作,无连锁,问,CcRr &times; ccRr的后代中,双隐性个体出现的频率为( )",{"answer":84,"createTime":5,"id":85,"options":86,"question":88,"source":27,"type":28},[],132605608,[8,87,9,10],"显性上位作用","白色猫和黑色猫交配,F1都是白色猫,F1互交,F2出现白猫:棕色猫:黑色猫=12:3:1,问这是什么原因?()",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":27,"type":28},[],132605609,[93,94,95,96],"aaBB","aaBb","AAbb","AaBb","AaBb &times; aaBb,在正常情况下,其子代不可能出现的基因型为()"]