b. zygote, pollen grain c. zygote, megaspore d. zygote, endosperm Simple fertilization: In sexual reproduction the combination of the female gamete (egg) and the male gamete (sperm) forms a zygote from which the offspring later develo...
结果1 题目 69. In the life cycle of a fern, the meiosis occurs during the(a) formation of spores(b) formation of gametes(c) germination of a spore(d) development of a zygote 相关知识点: 试题来源: 解析 (a) 反馈 收藏
formation of zygotesmaturation and germination of zygotesChlamydomonas geitleriThe present experiments enabled us to know whether various number of the cells in a volume unit or the average irradiance of the cells was the determining factor for the dependence of gametogenesis, formation of zygotes ...
B Balaban,B Urman,A Isiklar,... - 《Human Reproduction》 被引量: 327发表: 2001年 Ultra-rapid freezing of human multipronuclear zygotes using electron microscope grids. Comparing the in-vitro development after thawing up to blastocyst formation on day 5 after IVF, the outcome of the frozen...
Developmental biologists explore the intricate processes through which an organism grows and developsfrom a single fertilized egg. From the initial formation of the zygote to the formation oforgan systems, these scientists unlock the mysteries of life's formation. They investigate factors such as ...
Zygote为设计卡通者和以图例解释者提供3D多角形模型创造高质量动画和翻译。 模型是详细的和组织,以便您能迅速和高效率地与确切地一起使用什么您需要。 [translate] aAJUSTE 调整 [translate] acesses and applications) is essential for swift [translate] aContinual information technology innovation (i.e.,...
The maternal effect mutation sésame affects the formation of the male pronucleus in Drosophila melanogaster. After entering the oocyte and before the formation of the diploid zygote, the sperm nucleus is transformed into a male pronucleus, a process that involves ... B Loppin,M Docquier,F Bo...
The oocytes pass through leptotene, zygotene and pachytene stages of meiotic prophase I before arresting at diplotene. At these early meiotic stages, when various DNA repair proteins and many other factors are required for proper chromosome alignment and recombination, the oocytes are extremely ...
The genotypic constitution of a gamete or a zygote may be parallelized with a complicated chemico-physical structure. This reacts exclusively in consequence of its realized state, but not in consequence of the history of its creation. So it may be with the genotypical constitution of gametes ...
Planozygote numbers increased gradually over a 4-day interval, followed 6 days later by a parallel increase in cyst numbers. These gradual increases indicate that gamete formation and/or fusion did not occur in sudden, synchronized fashion, or alternatively that the duration of planozygote ...