how many replicated chromosomes are present in the cell in prophase?
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Recall that there are two divisions during meiosis: meiosis I and meiosis II. The genetic material of the cell is duplicated during S phase of interphase just as it was with mitosis resulting in 46 chromosomes and 92 chromatids during Prophase I and Metaphase I.
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Humans have 46 chromosomes, That number of chromosomes will be found a, in cells in anaphase. - : b. in egg and sperm cells. in somatic cells.
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Four replicated chromosomes are in the original cell. 7. How many single chromosomes are in each of the new cells in telophase? Four single chromosomes are in each of the new cells.
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The number of chromosomes in the new cells produced by cell division will be the same as/half that of the parent cell. During cell division each parent cell produces two/four new cells.
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During S phase, which follows G1 phase, all of the chromosomes are replicated. Following replication, each chromosome now consists of two sister chromatids (see figure below). Thus, the amount of DNA in the cell has effectively doubled, even though the ploidy, or chromosome count, of the cell remains at 2n.
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Which statement is correct concerning the relationship between chromosomes and chromatids? A replicated chromosome contains two sister chromatids. A replicated chromosome contains a single chromatid.
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6. Prophase II: Now there are two daughter cells, each with 23 chromosomes (23 pairs of chromatids). In each of the two daughter cells the chromosomes condense again into visible X-shaped structures that can be easily seen under a microscope.
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Mitosis is normal cell division. The cell will create a copy of it's DNA, resulting in 92 chromosomes temporarily in one cell, which will then split, creating two cells with 46 (23 pairs) chromosomes in them. If the cell then undergoes meiosis, it will be left with 23 chromosomes, unpaired.
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The key difference between interphase and prophase is that a cell spends a lot of time in interphase undergoing protein synthesis, DNA replication, and growth while the cell spends a short time in prophase by undergoing condensation of chromatin, pairing of homologous chromosomes and spindle fiber formation.
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*the beginning of meiosis : 46 chromosomes and each chromosome has one chromatid. *Prophase I : 46 Chrms, & each chromosome has 2 chromatid. *Prophase II: 23 Chrms, each one has 2 chromatids. *Telophase II: 23 chrms, each one has 1 chromatids.
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These cells are haploid—have just one chromosome from each homologue pair—but their chromosomes still consist of two sister chromatids. In meiosis II, the sister chromatids separate, making haploid cells with non-duplicated chromosomes. Prophase II: Starting cells are the haploid cells made in meiosis I.
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At the G1 phase of the cell cycle, each chromosome consists of a single chromatid and each chromatid consists of a single double-stranded DNA molecule. Therefore, a cell that normally has 12 chromosomes will have 12 DNA molecules in G1.
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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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Upon completion of telophase and cytokinesis, the single cell will be split into two cells. Each cell will contain 10 chromosomes, the same amount as the original progenitor cell.
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Now there are two daughter cells, each with 23 chromosomes (23 pairs of chromatids). In each of the two daughter cells the chromosomes condense again into visible X-shaped structures that can be easily seen under a microscope.
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Or: there are 23 unique types of chromosome in your cells (remember, we are treating the sex chromosomes as the same for simplicity). After replication of the 46 chromosomes, the cell contains 92 chromatids (in 46 pairs). After mitosis two identical cells are created with the same original number of chromosomes, 46.
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A diploid cell starts with 2N chromosomes and 2X DNA content. After DNA replication, the cells is still genetically diploid (2N chromosome number), but has 4X DNA content because each chromosome has replicated its DNA. Each chromosome now consists of a joined pair of identical sister chromatids.