A diploid cell remains 2n after replication, but doubles from 2c to 4c. Humans usually have 22 pairs of homolog chromosomes (autosomes) and as sex chromosomes 2 x chromosomes (in female), or 1 x and 1 y chromosome (in males), thus in total 46 chromosomes per body cell (see human karyogram; 2n = 46) and 92 chromatids per cell after replication.

2023年6月20日 · Following DNA replication, the DNA content doubles again to 4c, but each pair of sister chromatids is still counted as a single chromosome (a replicated chromosome), so the number of chromosomes remains unchanged at 2n. If the cell undergoes mitosis, each daughter cell will return to 2c and 2n, because it will receive half of the DNA, and one ...

减数分裂I（英語： meiosis I ，又称减数第一次分裂）会将同源染色体分离，并连接成四分体（2n 4c），产生两个单倍体细胞（n染色体，人类中为 23），每个细胞都包含染色单体对（1n，2c）。在该过程中，倍性从二倍体减少到单倍体，因此减数分裂I又称为reductional ...

2017年12月6日 · The number of chromosome and the amount of DNA are 2n/2c in G1 phase during interphase. The number of chromosome and the amount of DNA are changed into 2n/4c in S phase. The amount of DNA is separated exactly half into two daughter cells in mitosis.

In a haploid gamete (i.e., sperm or egg), the amount of DNA is 1c, and the number of chromosomes is 1n. Upon fertilization, both the DNA content and the number of chromosomes in the diploid zygote doubles to 2c and 2n, respectively.

2022年9月16日 · 2n 4c Two homolog chromosomes (diploid) consisting each of two sister chromatids (two yellow and two blue), thus 4c in total. What n value are cells made by meiosis? Mitosis produces two diploid (2n) somatic cells that are genetically identical to each other and the original parent cell, whereas meiosis produces four haploid (n) gametes that ...

2019年8月21日 · 下面标注了DNA含量 C应该是 染色体组 的意思 正常人体细胞内是二倍体就是2C 分裂前DNA复制所以是2-4C 4C就是正处于分裂且未分开的细胞。 这个图主要想表达的是处于 分裂前期 准备和分裂中细胞占总细胞数的比例。 看图注。 结果部分应该也会详细的写，讨论部分会讨论其 生物学 意义。 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。

2024年4月8日 · There are initially four chromatids (c) and two chromosomes (n) for each of the 23 chromosome pairs (4c, 2n). The nuclear envelope disintegrates and the chromosomes begin to condense. Spindle fibres appear which are important for …

(3)染色体数目为2n的生物减数分裂过程中染色体数目最多为2n，而有丝分裂过程中 染色体数目最多可为4n。 解析 图中B细胞处于有丝分裂后期，C细胞处于减数分裂Ⅱ后期，D细胞处于有丝 分裂中期，E细胞处于减数分裂Ⅰ中期。

1有丝分裂中染色体和dna变化的折线图中的2n4n是什么意思?相对值?还是按染色体组理解?如何理解?2减二中期的次级细胞染色体数目与体细胞相同?3如何记忆分裂（减数，有丝... 1有丝分裂中染色体和dna变化的折线图中的2n 4n是什么意思?相对值?还是按染色体组理解 ...