一个健康的受精卵有46个染色体(23对)，但在它能分化之前，它必须先分为23个一组，形成极体。
A healthy egg carries 46 chromosomes - 23 pairs - but before it can be fertilised it needs to ditch 23 of these, which it packages into a structure called a polar body.
生育专科经过了长期的探索，找到一种途径来检测受精卵或者胚胎以找出主要的异常染色体。
Fertility clinics have long sought a way to check eggs or embryos for major chromosome abnormalities.
孢子体：为苔藓和地钱的孢子体世代具有。由受精卵发育而来，包括基足、柄和孢蒴。孢子体是寄生在配子体上的。
Sporogonium the sporophyte generation in mosses and liverworts. it develops from the zygote and comprises the foot, seta, and capsule. the sporogonium is parasitic on the gametophyte generation.
采用延迟授粉和胚胎学显微观察的方法，研究了黑麦和六倍体小黑麦花粉诱导小麦孤雌生殖的假受精特性。
The study on pseudogamy property of wheat parthenogenesis is conducted by means of delaying pollination and observing embryo sac with microscope.
利用石蜡切片技术观察了埃及白睡莲的大、小孢子的发生，雌、雄配子体的发育，受精作用以及胚和胚乳的发育。
The megasporogenesis, microsporogenesis, female and male gametophyte development, development of embryo and endosperm were observed by using paraffin wax.
而平均混交雌体受精率则随食物浓度的升高而显著增大。
The mean fertilization rate increased when food concentration was higher.
方法：取试管婴儿助孕技术后未能受精成功的卵细胞，采用多色荧光原位杂交方法检测卵细胞13，16 ，18，2 1和2 2号染色体的情况。
Methods:Multicolor fluorescence in situ hybridization (M-FISH) was applied to check the chromosome status in oocytes for chromome 13,16,18,21 and 22.
观察结果提示了柿树多倍体由未减数配子受精产生的可能性。
These phenomena show the possibility of producing polyploid of Diospyros kaki L. by the unred…
观察结果提示了柿树多倍体由未减数配子受精产生的可能性。
These phenomena show the possibility of producing polyploid of Diospyros kaki L. by the unred…
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