问题
填空题 案例分析题
人类遗传病调查中发现两个家系都有甲遗传病（基因为H、h）和乙遗传病（基因为T、t）患者，系谱图如下。以往研究表明在正常人群中Hh基因型频率为10-4。请回答下列问题（所有概率用分数表示）：
若Ⅰ-3无乙病致病基因，如果Ⅱ-5与Ⅱ-6结婚，则所生男孩同时患两种遗传病的概率为（）
答案
参考答案：1/36
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人类遗传病调查中发现两个家系都有甲遗传病（基因为H、h）和乙遗传病（基因为T、t）患者，系谱图如下。以往研究表明在正常人群中Hh基因型频率为10-4。请回答下列问题（所有概率用分数表示）：
若Ⅰ-3无乙病致病基因，如果Ⅱ-5与Ⅱ-6结婚，则所生男孩同时患两种遗传病的概率为（）
参考答案：1/36
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| Doctors tell us that holidays are important. We should have a 1 from work for a week or two weeks every year. lf it is possible,they say, we should 2 Our homes and go to another 3 Of the country. We should go away for 4 .Then, after the holidays, we will be 5 and get ready for 6 again. But some people do not want to leave their homes to 7 in other places. They do not like a sudden change in their lives. They think their 8 are best of all. And some people can have a rest in 9 way. They can go to visit their friends. They can have 10 holidays together. | ||||
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