问题
单项选择题
患儿男，9岁。上学时不慎跌跤，右膝部出现血肿。既往常有类似情况发生，父母身体健康。
血友病是属于哪一种遗传类型
A．常染色体隐性遗传
B．常染色体显性遗传
C．性连锁隐性遗传
D．性连锁显性遗传
E．Y染色体显性遗传
答案
参考答案：C
解析： 血友病是X染色体伴性隐性遗传，男性发病，女性传递。
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患儿男，9岁。上学时不慎跌跤，右膝部出现血肿。既往常有类似情况发生，父母身体健康。
血友病是属于哪一种遗传类型
A．常染色体隐性遗传
B．常染色体显性遗传
C．性连锁隐性遗传
D．性连锁显性遗传
E．Y染色体显性遗传
参考答案：C
解析： 血友病是X染色体伴性隐性遗传，男性发病，女性传递。
小题3: their sons were at school. The 小题4: seemed hopeless. Two weeks later, however, Mr. Chen got some good news. A health care project would 小题5: medical treatment for poor patients in western China. They 小题6: to pay only half the cost or even less. Thanks to the project, he was able to receive an operation just in time to prevent(防止) the illness from getting 小题7: . Now he has returned to his family. The 小题8: of this health care project is to improve the situation of poor people in western China. So far, the project 小题9: more than 5,000 people. The Chinese government 小题10: to develop a new health care model for China. As our country develops, we must remember to care for the weakest members. |