what is the difference between prophase one and prophase two?
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1 Answer. Mandira P. Prophase I of meiosis is a very elaborate phase subdivided in leptotene, zygotene, pachytene, diplotene and diakinesis. Prophase II is less eventful, similar to mitotic prophase.
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The main difference between prophase and metaphase is that chromosomes condense during prophase whereas homologous chromosome pairs align in the equatorial plate of the cell during metaphase.
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During prophase I and metaphase I of meiosis, a chromosome consists of a tetrad (4 chromatids or 4 DNA molecules) and is reduced to two chromatids (2 DNA molecules) by the time metaphase II occurs. 3.
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Mitotic prophase The main events of prophase are: the condensation of chromosomes, the movement of the centrosomes, the formation of the mitotic spindle, and the beginning of nucleoli break down.
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Both Meiosis I and II have the same number and arrangement of phases: prophase, metaphase, anaphase, and telophase. Both produce two daughter cells from each parent cell.
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prophase 1. How many cells are formed at the end of meiosis 1 & how many copies of chromosomes does each cell have? 2 cells are formed at the end of meiosis. 2 copies (not two sets) that compose the sister chromatids (the cells are haploid).
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Therefore, meiosis includes the stages of meiosis I (prophase I, metaphase I, anaphase I, telophase I) and meiosis II (prophase II, metaphase II, anaphase II, telophase II).
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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. However, these chromosomes are not arranged in the same way as they were during mitosis.
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Prophase:Prophaseisthefirstphaseofcelldivision. Interphase:DNAinthenucleusexistsaschromatin,whichisalongthreadlikestructure. microscope.
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During the prophase in the process of cell division called mitosis, the centrosomes migrate to opposite poles of the cell. The mitotic spindle then forms between the two centrosomes. Upon division, each daughter cell receives one centrosome.
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In meiosis II, the phases are, again, analogous to mitosis: prophase II, metaphase II, anaphase II, and telophase II (see figure below). As shown in the figure below, meiosis II begins with two haploid (n = 2) cells and ends with four haploid (n = 2) cells.
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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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In prophase I, the DNA has already undergone replication so each chromosome consists of two identical chromatids connected by a common centromere. During the zygotene stage of prophase I, the homologous chromosomes pair up with each other.
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what's the difference between anaphase I and anaphase II? products of one are the reactants for the other. ... anaphase 2 is like mitosis because separation and splitting up centromere.In anaphase I the homologous chromosomes separate, in anaphase II the centromere splits, in mitosis anaphase the centromere splits.
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In the anaphase I, homologous chromosomes (bivalent) separate to opposite poles, retaining sister chromatids together, whereas anaphase II chromatids of a chromosome separate to opposite poles, splitting the centromere.
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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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45) What is a major difference between mitosis and meiosis I in a diploid organism? A) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I.