题目

请回答有关绵羊遗传与发育的问题： (1)假设绵羊黑面(A)对白面(a)为显性，长角(B)对短角(b)为显性，两对基因位于常染色体上且独立遗传。①在两组杂交实验中，Ⅰ组子代只有白面长角和白面短角，数量比为3∶1；Ⅱ组子代只有黑面短角和白面短角，数量比为1∶1。其亲本的基因型组合是：Ⅰ组______，Ⅱ组________。 ②纯种与非纯种的黑面长角羊杂交，若子代个体相互交配能产生白面长角羊，则杂交亲本的基因型组合有________。 (2)假设绵羊的面色性状属于单词拼写（共10小题；每小题1分，共10分） In the old times, many political leaders were not thought ________（高度评价） of. Father _______ (承诺，许诺)to buy me a computer if I do well in the final examination. He is _______（诚实的） and he never tells lies. Once he was the _______ （教练）of our football team Many rare animals are in ________（危险）because they are being hunted for. While reading, please pay much __________ （注意）to your pronunciation. Our school was _________ （设计）by a famous professor from Tongji University. People say that barking dogs don’t ________ .(咬) Dave didn't __________ （回复）to any of her emails, which made her angry. I am busy, so I have to e_________ （雇佣）a housekeeper to look after my children.