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An unusual pairing of homologous X chromosomes occurs during X inactivation. A new study in mouse embryonic stem cells shows that telomeres and the telomeric RNA PAR-TERRA are responsible for additional pairwise interactions that guide Xic-Xic pairing....
a tetrad of spores a group of four synapsed chromatids that become visibly evident in the pachytene stage of meiotic prophase and are produced by the longitudinal splitting of each of two paired homologous chromosomes tetrad 例句 1.This blood moon is special because it the first lunar eclipse ...
5.Diplotene In MEIOSIS, the stage in late PROPHASE I when the pairs of chromatids begin to separate from thetetradformed by the association of homologous chromosomes. 在减数第一次分裂 前期中 靠后 一个阶段。 声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本...
As seen in the figure, step 1 involves the duplication of chromosomes. This is followed by steps 2 and 3, where homologous chromosomes pair up to form tetrads, which undergo crossing over in step 4. The final step, 5, produces four daughter cells with half the number of chromosomes contai...
1.a group or series of four 2.the number four 3.Botanya group of four cells formed by meiosis from one diploid cell 4.Geneticsa four-stranded structure, formed during the pachytene stage of meiosis, consisting of paired homologous chromosomes that have each divided into two chromatids ...
美 英['tetræd] n.【生】四合子;四个;四个一组的东西;【化】四价元素 网络四分体;四合体;四位组 复数:tetrads 英汉 英英 网络释义 n. 1. 【生】四合子,四分体 2. 四个;四个一组的东西 3. 【化】四价元素 4. 【几】拼四小组
17. In diplotene the pairs of chromatids begin to separate from the tetrad formed by the association of homologous chromosomes. 双线期时,配对的染色单体开始从四分体中分离,此时常可见染色体交叉。 youdao 18. The Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning ...
Lesson Summary The tetrad occurs during the first phase of meiosis. It is the foursome of chromatids that forms when replicated homologous chromosomes align.
In which phase of Meiosis 1 does tetrad occur? How are meiosis 1 and meiosis 2 different? What are the two distinct divisions of meiosis? How does metaphase in meiosis I and meiosis II differ? What is the pairing of homologous chromosomes during meiosis?