Meiosis occurs when a parent cell divides to produce 4 daughter cells with half the original genetic content in order to produce gametes. This is different than mitosis (or mitotic cell division), where the parent cell divides to give two genetically identical daughter cells. The process of ...
题目What is the main purpose of mitosis? A. Genetic variation B. Production of gametes C. Growth and repair D. Reduction of chromosome number 相关知识点: 试题来源: 解析 C。原因:有丝分裂的主要目的是生长、修复和无性繁殖。反馈 收藏
Meiosis is similar to the cell division process of non-sex cells known asmitosis. Mitosis produces two cells that are genetically identical to and contain the same number of chromosomes as the parent cell. These cells arediploidcells because they contain two sets of chromosomes. Human diploid cel...
violaceus chromosomes were more competitive in entering meiosis. The majority of fertile gametes were deduced to have been produced by PMCs with a B. juncea complement with or without additional O. violaceus chromosomes. (3) The progeny plants from selfed hybrids between B. juncea and O. ...
By comparison, during mitosis in diploid cells, chromosomes replicate and sister chromatids segregate to generate daughter cells that are diploid (2n) and genetically identical to the initial cell. Abnormal gametes resulting from anomalies during meiosis have been shown to be useful for the genetic ...
In ovaries, the final products of meiosis are Is the zygote before the germinal stage? Does natural selection lead to genetic drift? Is mitosis cell growth or cell reproduction? Is TP53 mutation genetic? Is gene flow the result of mating between populations?
[Ns]) segregants, whereas genetically stable disomic plants do not segregate: they produce only disomic addition lines (2n = 44, AABBDD + 1′′ [Ns]). This is because, in meiosis, the monosomic addition lines are expected to produce two different gametes: ABD and ABDNs, while...
Both QTLs co-localised with genes encoding for putative AtJAS homologs, a key regulator of meiosis II spindle orientation in Arabidopsis thaliana. The function of these candidate genes is consistent with the cytological phenotype of mis-oriented metaphase II plates observed in the parental clones. ...
Some species induce immediately in early stages of microspore genesis; however, in most cases the first pollen meiosis is needed [26]. Brassica napus embryogenesis is most effective in a highly vacuolated microspore development stage, just before pollen mitosis [27,28]. Another important aspect ...