题干

如图为某家族的遗传系谱图,甲病基因用A或a表示,乙病基因用E或e表示,其中有一种病的基因位于X染色体上;男性人群中隐性基因a占1%.下列推断正确的是(    )


A:个体2的基因型是EeXAXa

B:个体7为甲病患者的可能性是 3310000

C:个体5的基因型是aaXEXe

D:个体4与2基因型相同的概率是 13

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D

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    Years ago, I lost my sight completely. I would do anything for a 1 . In fact, desperate and 2 , I tried every supplement, experimental trial, diet and anything anyone 3 . All for nothing.

    But now, after 25 years in physical darkness, my life is 4 than ever. The change began one day, many years ago, when I drank my tea 5 , swallowing gulps(一大口) of “poor me” and wondering what my future would 6 . Then, the doorbell rang. Janet came in and brought an idea. “Have you ever thought about working as a(n) 7 ? ” she said, “You speak Spanish. Go for it.”

    Her idea 8 me to make a phone call. And the interpreting company I contacted invited me to take a test. Thank goodness it was 9 .

    “We're so 10 with the results,” the receptionist said the next day, “that we want to send you on your first 11 tomorrow. It's in the Immigration and Naturalization Court.”

    That was the beginning. That was when I began to 12 possibilities when my blindness wouldn't get 13 . The view of my world had changed. Blindness didn't have to label me as

    14 . On the contrary, the blindness improved my ability to 15 information and present a quicker and more 16 interpretation.

    The letters from judges, praising me for my work, 17 me for the hours I'd spent studying, memorizing, and 18 .

    Blindness? Not a barrier any more. 19 , it became a handy 20 to sharpen my creativity. Not only in the courtroom, but at home, in my relationships and in the way I viewed myself.