The megagametophyte within the ovule of a flowering plant.
胚囊 Embryo sac 有花植物胚珠内

子体。
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基础入门 


生


与生

生

In Klinefelter syndrome, the sex chromosome pairs which is either XX or XY don't separate in meiosis I in the male or female germ cell and this resulted in two gametes with a pair of X chromosomes and two gametes without X chromosomes.
Klinefelter综合征中,配对的XX或XY性染色体对在父亲或母亲的第一次减数
裂中没有
离,从而产生了两个有两条X染色体的配子以及两个没有X染色体的配子。
生科
报
生科
报 " What does that mean for people who don't have gametes? " Sharpe asks. " That is, as of now, an unanswered question. But it's an important question to answer, because you can't have a definition of sex that doesn't apply to everyone."
“对于没有配子的人来说,这意味着什么?”山姆·夏普问道。“这是一个目前还没有答案的问题。但这是一个重要的问题,因为性别定义不能不适用于所有人。”