题目

    My daughter and I went out for some shopping. While I was waiting to     11    , my daughter asked if she could wait for me at the door.     Minutes later she returned to ask if she could give the     l2     she had just bought to a man in the street, so there she went and     l3     her sweets away. Another 2 minutes later, she    l4    again to ask me for something else she could give to the man. I told her that I only had some biscuits for dessert, so she took them to the man and came back with a huge   15     on her face.     When如图为一对同源染色体及其上的等位基因,下列说法错误的是A．来自父方的染色单体与来自母方的染色单体之间发生了交叉互换B．B与b的分离发生在减数第一次分裂C．A与a的分离仅发生在减数第一次分裂D．A与a的分离发生在减数第一次分裂和减数第二次分裂