题目

       Tu Youyou, an 84-year-old female scientist, became the first Chinese citizen to win a Nobel Prize in science on Oct.5 2015. While the new has   41   China’s national pride, it has also  42   differences in prize-awarding practices between China and the Western world.        Tu  43   the 2015 Nobel Prize for Medicine with Irish-born William Campbell and Satoshi Omura of Japan for unlocking revolutionary   44   for parasitic diseases. Campbell and Omura were honoured for their anti-roundworm treatment, while Tu  45   a new drug for malaria.     下列叙述中错误的有多少个（    ） ①基因重组只能产生新基因型，基因突变才能产新的基因 ②一对相对性状中，显性性状个体数量要比隐性性状个体多 ③X染色体上的基因控制的性状在雌性个体中易于表现 ④一对等位基因中，基因频率相等时，显性性状个体数量多 ⑤在植物的一生中，分化在种子形成过程中达到最大 A．1个      B．2个     C．3个     D．4个