无核精子

无核精子的释放时间早于真核精子束。

The release time of apyrene sperm was early than that of eupyrene sperm .

真核精子与无核精子在活动比率和运动方式上都有显著差异。

Moreover , there was distinct difference in the rate of motility and movement fashion between eupyrene sperm and apyrene sperm .

小地老虎真核和无核精子的超微结构

Ultrastructure of eupyrene - apyrene sperm Agrotis Ypsilon

棉铃虫真核和无核精子束从精巢中排出后，其细微结构在修精囊中发生了显著的变化。

After the eupyrene and apyrene sperm were released from testis , their ultrastructure changed distinctly in the sperm-modified vesicle .

但32℃温度以下不影响真核到无核精子的发生和二叉发生的转换。

But the risen temperature ( < 32 ℃ ) had no effects on dichotomous spermatogenesis and the shift of spermatogenesis from eupyrene sperms to apyrene .

和大部分鳞翅目昆虫一样，家蚕具有精子二型性：上蔟吐丝前产生有核精子，之后则产生无核精子。

As most of the Lepidopteran insects , the silkworm has sperm dimorphism . They generate sperm with nuclei before the silkworm spinning , after that , they produce sperm without nuclei .