从显微镜下看到一个正在分裂的动物细胞,如图所示,则此动物的初


从显微镜下看到一个正在分裂的动物细胞,如图所示,则此动物的初级卵母细胞中,四分体数、染色单体数、DNA分子数依次是(  )

A336
B
3612
C366
D
31212

答案

解:由于图示动物细胞中含有3条染色体,不含同源染色体,且染色体的着丝点都排列在赤道板上,处于减数第二次分裂中期.因此,此动物的初级卵母细胞中,四分体数、染色单体数、DNA分子数依次是31212
故选:D

相关题目

(20分)观察下列图片,阅读材料回答问题。  材料一:读
(20分)观察下列图片,阅读材料回答问题。  材料一:读下列图片信息                                         材料二:19世纪
If you _______ yourself to an unpleasant situation or fact, you accept it becau
If you _______ yourself to an unpleasant situation or fact, you accept it because you realize that you cannot change it. A. commit                        B. transfer    
如图所示,某人用力F沿着倾角为目的斜面匀速推着一大箱西
如图所示,某人用力F沿着倾角为目的斜面匀速推着一大箱西瓜前进,在箱子的中央有一只质量为m的西瓜,则该西瓜随箱—起匀速前进的过程中受到周围
根据汉语拼音写出汉字。   狭(ài)_____        (huò)_____达
根据汉语拼音写出汉字。   狭(ài)_____        (huò)_____达     见(yì) _____思迁    精(yì)_____ 求精
给出以下四个问题,①, 输出它的相反数.        ②求面积
给出以下四个问题,①, 输出它的相反数.        ②求面积为的正方形的周长.③求三个数中输入一个数的最大数.          ④求函数的函数值.  其
Sugar is sold by _______ pound, petrol by _______ gallon. A. a; a B. a; the
Sugar is sold by _______ pound, petrol by _______ gallon. A. a; a B. a; the C. the; a D. the; the
Since we are not wealthy now, we’d better take our daily expenses into _____.
Since we are not wealthy now, we’d better take our daily expenses into _____. A. thought                      B. account               C. position      D. eff
He came in, __ his coat and sat down. A. took down B. took off C. taking down D
He came in, __ his coat and sat down. A. took down B. took off C. taking down D. taking off

最新题目