The spermatogonium remained replicating activity of DNA during the developing stage.
在生后各发育阶段中，精原细胞始终保持DNA复制的能力。
2
It was difficult to distinguish oogonium from spermatogonium according to the shape and size of gonium under light microscope.
在光镜下难以根据性原细胞的形态和大小区分卵原细胞和精原细胞。
3
In order to study the general law on meiosis of Periplaneta Brunnea. Air-dried method was used to observe the chromosome of spermatogonium in different stages.