Question

下列符号代表精子的染色体，a和a′是一对同源染色体，其余类推，下列哪四个精子来自同一精原细胞

1. A.
   ab′ca′bcabc′a′bc′
2. B.
   abc′a′b′ca′b′cabc′
3. C.
   a′bc′a′bca′bc′ab′c
4. D.
   ab′ca′bca′b′c′abc′

Answer 1

B