题干

一对表现正常的夫妇,其家族中都有遗传性囊性纤维化病(常染色体隐性遗传病)患者.医生对他们进行了遗传咨询后,决定运用试管婴儿的方法实现他们的优生愿望.

(1)医生首先为女性注射____ ,刺激卵泡成长,实现控制性超数排卵,然后在局部麻醉下从卵巢中吸取____ ,并在显微镜下将其移到含特殊培养液的培养皿中,置于37℃培养箱中培养.

(2)从男性体内采集精子经过____ 处理,其方法通常采用____ 和____ .处理后的精子与卵子放在含有____ 的同一培养皿中完成____ 

(3)将受精卵移入发育培养液中继续培养,检查____ ,分别对多个胚胎的细胞进行基因检测,选择出无致病基因的胚胎(____ 个细胞阶段)植入母亲____ 内,避免遗传病孩子出生.

上一题 下一题 0.0难度 选择题 更新时间:2018-06-19 12:23:25

答案(点此获取答案解析)

\u4fc3\u6027\u817a\u6fc0\u7d20,\u5375\u6bcd\u7ec6\u80de,\u83b7\u80fd,\u57f9\u517b\u6cd5,\u5316\u5b66\u8bf1\u5bfc\u6cd5,\u53d7\u7cbe\u57f9\u517b\u6db2\uff08\u6216\u83b7\u80fd\u6db2\uff09,\u4f53\u5916\u53d7\u7cbe,\u53d7\u7cbe\u72b6\u51b5\u54

同类题3

阅读理解

    Natalie Doan, 14, has always felt lucky to live in Rockaway, New York. Living just a few blocks from the beach, Natalie can see the ocean and hear the wave from her house. "It's the ocean that makes Rockaway so special," she says.
    On October 29, 2012, that ocean turned fierce. That night, Hurricane Sandy attacked the East Coast, and Rockaway was hit especially hard. Fortunately, Natalie's family escaped to Brooklyn shortly before the city's bridge closed.
    When they returned to Rockaway the next day, they found their neighborhood in ruins. Many of Natalie's friends had lost their homes and were living far away. All around her, people were suffering, especially the elderly. Natalie's school was so damaged that she had to temporarily attend a school in Brooklyn.
    In the following few days, the men and women helping Rockaway recover inspired Natalie. Volunteers came with carloads of donated clothing and toys. Neighbors devoted their spare time to helping others rebuild. Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in powerless high-rise buildings.
    "My mom tells me that I can't control what happens to me," Natalie says. "But I can always choose how I deal with it."
    Natalie's choice was to help. She created a website page matching survivors in need with donors who wanted to help. Natalie posted introduction about a boy named Patrick, who lost his baseball card collecting when his house burned down. Within days, Patrick's collection was replaced. In the coming months, her website page helped lots of kids: Christopher, who received a new basketball; Charlie, who got a new keyboard.Natalie also worked with other organizations to bring much-need supplies to Rockaway. Her efforts made her a famous person. Last April, she was invited to the White House and honored as a Hurricane Sandy Champion of Change.
    Today, the scars of destruction are still seen in Rockaway, but hope is in the air. The streets are clear, and many homes have been rebuilt. "I can't imagine living anywhere but Rockaway," Natalie declares. "My neighborhood will be back, even stronger than before."