天气预报 > 教育 > 配子法解题步骤
配子法解题步骤
更新时间: 2021-04-10 14:47:04  

1、配子法解题步骤:P:BB×bb→F1:Bb。

2、F1:Bb×Bb自由交配除去bb→F2:1/3BB、2/3Bb,F2中不论是雄性配子或雌性配子都会产生2/3B、1/3b这两种类型。

3、让F2中的雌雄个体自由交配得获得F3,除去bb。

4、果子二代、子三代中不除去残翅果蝇,则P:BB×bb→F1:Bb;F1:Bb×Bb→F2:1/4BB、1/2Bb、1/4bb,让F2中的雌雄个体自由交配得获得F3。

关键词: 解题 步骤

配子法解题步骤相关经验

天气预报

最新推荐

页面:/news/view-684278/ | 耗时:0.2813 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=684278 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=684278 LIMIT 0,1
select * from tbl_Articles_sphinx where id=684278 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(640501,2900267,1492707,780457,2033299,1196997,3518542,2342414,416281,903265,1094591,1137572,571674,3034097,2733368,3125585,1203411,1105114,3313722,1370631,1560715,1534333,1203711,990415,1186427,1096969,368735,450346,2741724,3474314) ORDER BY field (ArticleID,640501,2900267,1492707,780457,2033299,1196997,3518542,2342414,416281,903265,1094591,1137572,571674,3034097,2733368,3125585,1203411,1105114,3313722,1370631,1560715,1534333,1203711,990415,1186427,1096969,368735,450346,2741724,3474314)