基因分离规律的实质是()
A.子二代出现性状分离
B.子二代性状的分离比为3:1
C.测交后代性状的分离比为3:1
D.等位基因随同源染色体的分开而分离
参考答案:D
--I can’t solve the math problem because it is too difficult. What should I do?
-- _________ ask the teacher for help?
A.How about
B.What about
C.Why don’t you
D.Why not you
对哪些人可以扭送公安司法机关处理?