A:6个亲本都是杂合体
B:抗病对感病为显性
C:红种皮对白种皮为显性
D:这两对性状自由组合
It's a snowy day. Let's make a snowman. Let's make a big snowball for his ____, and a small snowball for his ____. Let's draw his ____. Let's put two sticks for his ____. Let's put a hat on him. I ____ he's wonderful!
我们所学的常见的立体图形有____体,____体,____体.