are chromosomes duplicated in meiosis?
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During meiosis, chromosomes are replicated once in S phase (just like mitosis) into sister chromatids, but the cell divides twice. As with mitosis, the first step in this process is DNA replication, so that each of the 46 chromosomes exists as a duplicated sister chromatid.
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During meiosis II, the sister chromatids within the two daughter cells separate, forming four new haploid gametes. The mechanics of meiosis II is similar to mitosis, except that each dividing cell has only one set of homologous chromosomes.
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genetically, it's because mitosis produces diploid cells with identical without crossing over chromosomes while meiosis produces haploid cells that result in non-identical DNA due to the choosing ones chromosomes. ... Half of the chromosomes go into one cell and half go in the other.
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During the first stage of meiosis, the HOMOLOGUES (1-23) are segregated into different cells, resulting in 2 cells that each have 1 copy of each of the 23 chromosomes (still duplicated from DNA replication).
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At the end of the division process, duplicated chromosomes are divided equally between two cells. These daughter cells are genetically identical diploid cells that have the same chromosome number and chromosome type.
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Both Meiosis I and II have the same number and arrangement of phases: prophase, metaphase, anaphase, and telophase. ... In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
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Are any of the meiotic products genetically identical? ... The nuclei produced by mitosis are genetically identical. True. In general, eukaryotic cells have two chromosomes of each type.
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Germ cells have only half the number of chromosomes as a diploid cell   one of each pair. The number of chromosomes is reduced from 46 (23 pairs) to 23 during the process of meiosis. Because they have only half the total chromosomes in a somatic cell, they are termed haploid (n).
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Mitosis vs. meiosis. Mitosis allows for cells to produce identical copies of themselves, which means the genetic material is duplicated from parent to daughter cells. Mitosis produces two daughter cells from one parent cell.
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The gametes produced in meiosis aren't genetically identical to the starting cell, and they also aren't identical to one another. ... The four gametes produced at the end of meiosis II are all slightly different, each with a unique combination of the genetic material present in the starting cell.
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In meiosis I, homologous chromosomes separate, while in meiosis II, sister chromatids separate. Meiosis II produces 4 haploid daughter cells, whereas Meiosis I produces 2 diploid daughter cells.
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1 Answer. During meiosis 1, the parent cell with double the normal amount of chromosomes, splits into two diploid cells (have enough chromosomes to survive). During meiosis 2, the two diploid cells each split into two haploid cells (have half the amount of chromosomes to survive). Meiosis ends with four haploid cells.
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In meiosis, however, you start with a diploid cell that divides twice to produce four haploid cells. In other words a diploid cell that has 2n chromosomes produces four cells, each of which contains n chromosomes.
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Meiosis produces four genetically different haploid cells. Unlike mitosis, meiosis is a reduction division – the chromosome number is halved from diploid (46 chromosomes in 23 pairs in humans) to haploid (23 chromosomes in humans).
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Homologous Chromosomes. In diploid (2n) organisms, the genome is composed of homologous chromosomes. ... Homologous chromosomes are similiar but not identical. Each carries the same genes in the same order, but the alleles for each trait may not be the same.
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In diploid (2n) organisms, the genome is composed of homologous chromosomes. Homologous chromosomes are similiar but not identical. ... Each carries the same genes in the same order, but the alleles for each trait may not be the same.
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How do homologous chromosomes differ from sister chromatids? Homologous chromosomes are the two chromosomes that make a chromosome pair. A sister chromatid is the duplicate of each of the pair of homologous chromosomes. Each of the chromosomes that make up the homologous pair is derived from each parent.