A:Ⅳ-2性染色体异常是因为Ⅲ-2在形成配子过程中X、Y没有分开
B:此家族中,Ⅲ-3的基因型是XHXh,Ⅳ-1的基因型是XHXH或XHXh
C:若Ⅲ-2和Ⅲ-3再生育,Ⅳ-3个体为男性且患血友病的概率为1/2
D:若Ⅳ-1和正常男子结婚,所生育的子女中患血友病的概率是1/4
Danny's class 1have a party. Danny wants to make a special cake2 the party. He wakes up early in the morning. He won't be 3. Danny begins 4the cake. He puts some flour(面粉), oil(油), milk and a little salt(盐) 5 the bowl(碗). He makes a picture6 it. It 7 like the flag of Canada. But he forgets 8 the sugar. There is 9 in the cake, too. Every piece of the cake 10 a cent in it.
如图所示,有关电与磁的下列描述中,正确的是( )
上海农科院培育出的水稻品种——“优糖米”,口感与普通大米无异,但其中的淀粉难以在消化道内分解为葡萄糖,餐后不仅血糖稳定,还能增加饱腹感,为糖尿病患者带来了福音。为探究“优糖米”是否具有维持血糖的功能,某科技小组设计了如下探究方案: