题干

下图表示某高等动物个体的四个细胞,下列叙述中不正确的是(   )
 

A:正常情况下丙细胞中没有等位基因

B:甲和乙图所示的细胞中DNA含量相同

C:乙和丙图可能发生分离规律

D:具有四个染色体组的是图乙

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答案(点此获取答案解析)

C

同类题4

阅读理解

    Filmmaker Jennifer Nelson had to pay $1,500 to have “Happy Birthday to You” sung in the movie she's making. The money went to Warner Music Group, a company that claims to own the copyright on the song. A copyright is the legal right to use or sell a creative product such as a song, a TV show, a book, or a work of art. Warner has claimed the copyright for “Happy Birthday to You” since 1988.

    “I never thought the song was owned by anyone,” Nelson said in an e-mail to The New York Times. “I thought it belonged to everyone.”

    Nelson's movie is a documentary — a film that uses pictures and/or interviews with people to create a factual report of real-life events — and is actually about the history of the “Happy Birthday” song itself.

    Two sisters named Mildred and Patty Hill wrote a song called “Good Morning to All” in 1893. Over a short period of time, people began to sing the words “happy birthday to you” in place of the original lyrics to the tune of the Hill sisters' song.

    A number of history experts say that there is no record of who actually wrote the “Happy Birthday to You” lyrics. Historians also say there is no way to know when the general public began singing the “Happy Birthday” song, but they believe it was being sung by the public long before it was printed and owned by a company.

    Nelson's lawyers say this piece of music's history proves that “Happy Birthday to You” belongs to everyone in the general public. That would mean Warner Music Group has no right to charge anyone a fee to sing the song in any setting.

    Experts estimate that Warner/ Chappell, the publishing division of the Warner Music Group, has made about $2 million a year from licensing fees for “Happy Birthday to You.”

    Nelson's lawyers are asking a court in New York City to order Warner/Chappell to return fees they have collected over the past four years for use of the “Happy Birthday” song.