(c)Explain the importance of meiosis in the production of gametes. 相关知识点: 试题来源: 解析 1.halves the chromosom number2.to produce a haploid nucleus3.allows genetic variation (in gametes )4.through dependen ssortment5.through crossing over ...
Gametes, or reproductive cells, are produced in a special kind of cell division called meiosis. During this process the normal number of the cell's chromosomes is reduced by half. Each gamete ends up with a copy of one chromosome from each pair. Meiosis is a continuous process, but for ...
Specifically, during mitosis, each chromosome lines up at the cell's equatorial plane, where the two sister chromatids of each chromosome are pulled apart before being distributed to the daughter nuclei. Meiosis, a unique way to produce gametes: Meiosis, a special type of cell division, is ...
Because the appearance of the chromosomes might be different in different stages of division, a knowledge of what happens during mitosis and meiosis helps for an understanding of chromosome morphology. The function of mitosis is to make two cells where there was one before, ensuring at the same ...
of the parental genomes. In eukaryotes, sex involves meiosis-mixis-cycles and is tied to reproduction. The prevalence of sexual reproduction in eukaryotes is striking because of the obvious high costs of sex [2]: first, recombination during meiosis breaks up beneficial gene combinations; associated...
The number of male gametes is critical for reproductive success and varies between and within species. The evolutionary reduction of the number of pollen grains encompassing the male gametes is widespread in selfing plants. Here, we employ genome-wide as
megagametophyte- the female gametophyte produced by the megaspore of a plant that produces both microspore and megaspores gametophyte- the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations Based on WordNet 3.0, Farlex clipart collection. © 2003-20...
Secretory cells lining the lumen of the mammalian oviduct synthesize and secrete proteins that have been shown to interact with and influence the activities of gametes and embryos. We hypothesized that the presence of gametes in the oviduct alters the oviductal secretory proteomic profile. We used a...
These stem cell-derived germ cells appear to be capable of undergoing meiosis and generating both male and female gametes. But most of gametes turn out to be not fully functional due to their abnormal meiosis process compared to endogenous germ cells. Therefore, a robust system of differentiating...
To produce haploid spores, meiocytes must succeed in entering meiosis I, pass through the transition of the meiosis I to meiosis II, and exit meiosis II. Some errors in these processes are usual and can result in parthenogenesis, teratoma generation, or the production of 2n gametes without a ...