how many chromosomes in meiosis and mitosis?
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In Mitosis cell divide and gave us 46 chromosome in each two daughter cells. Meiosis divide in 4 cells in that chromosomes divide in 23 pair each.
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By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. The overall process of meiosis produces four daughter cells from one single parent cell. Each daughter cell is haploid, because it has half the number of chromosomes as the original parent cell.
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As gametes are formed, the 46 chromosomes from each parent cell (23 pairs of chromosomes) are divided through meiosis so that each gamete is haploid, having only 23 unpaired chromosomes.
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1 Answer. Mitosis gives two nuclei, and hence two cells, while meiosis gives four. Mitosis gives identical cells to each other and to the mother cell, while meiosis leads to genetic variation due to crossing over and independent assortment.
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There are 20 chromosome present in diploid cell at mitotic anaphase if its egg cell has 10 chromosome because the chromosome number in a mitotic division double during the late prophase and in the metaphase they align in the equitorial plate and separate into each of the two daughter cells.
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The first division is called the reduction division – or meiosis I – because it reduces the number of chromosomes from 46 chromosomes or 2n to 23 chromosomes or n (n describes a single chromosome set).
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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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Mitosis versus meiosis. Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.
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The process of meiosis involves two divisions of the genetic material. The first division is called the reduction division – or meiosis I – because it reduces the number of chromosomes from 46 chromosomes or 2n to 23 chromosomes or n (n describes a single chromosome set).
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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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During anaphase, we now have a total of 16 chromosomes and 16 chromatids – in short, each chromatid is now a chromosome. Similarly, in humans, there are 92 chromosomes present and 92 chromatids during anaphase. These numbers remain the same during telophase.
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Mitosis and meiosis both involve duplication of a cell's DNA content. Each strand of DNA, or chromosome, is replicated and remains joined, resulting in two sister chromatids for each chromosome. A common goal of mitosis and meiosis is to split the nucleus and its DNA content between two daughter cells.
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At the end of mitosis, 2 daughter cells both have 46 chromosomes. How many divisions occur in meiosis? Two, each including prophase, metaphase, anaphase and telophase. Meiosis begins with a diploid germ cell and produces a haploid sex cell (sperm or egg).
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In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
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The final result of meiosis is four sex cells, each with half the number of chromosomes of the original parent cell. Each cell has only one chromosome from each original homologous pair. When male and female sex cells combine to form offspring, each sex cell contributes half the normal number of chromosomes.
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Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.
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Similarly, in humans, there are 92 chromosomes present and 92 chromatids during anaphase. These numbers remain the same during telophase. It is only after the end of mitosis – when the dividing cells have fully separated and the membranes have reformed – that the normal chromosome number is restored to the cell.