Mitosis and meiosis diploid (2n): 2 sets of homologous chromosomes haploid (1n): 1 single set of homologous chromosomes this cell has 2 pairs of chromosomes 1 long, 1 short there are two sets of 2 similar (homologous) chromosomes. Meiosis a type of nuclear division associated with sexual reproduction, producing four haploid (1) cells from a single diploid (1) cell, the process involving two cycles of division although meiosis is a continuous process it has been divided into numerous stages, given below. Meiosis is then split into two phases: meiosis i and meiosis ii in each of these phases, there is a prophase, a metaphase, and anaphase and a telophase in each of these phases, there is a prophase, a metaphase, and anaphase and a telophase.
Prophase i is the first phase of meiosis i this phase is more complicated and prolonged as compared to the similar stage of mitosis prophase i is divided into five sub-phases: leptotene, zygotene, pachytene, diplotene and diakinesis. The picture depicts what phase of meiosis propase 1 prophase 2 anaphase 1 anaphase 2 4 crossing-over occurs during: anaphase 1 metaphase 1 prophase 1 prophase 2 5 meiosis is a type of cell division that produces: zygotes chromosomes dna gametes 6 which of the following distinguishes prophase 1 of meiosis from prophase of mitosis. In prophase of mitosis the sister chromatids prepare to be separated into two daughter cells mitosis creates two daughter cells that each contain the same number of chromosom es as the parent cell (2n) in prophase i of meiosis, the homologous chromosomes prepare to be separated. In prophase i of meiosis, a tetrad is formed between 2 homologous chromosomes and their replicates small pieces are exchanged between the chromosomes and the tetrad breaks up then things.
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) meiosis generates gamete genetic diversity in two ways: (1) law of independent assortment. Prophase i this is the most complex of the various stages of meiosis once upon a time the only tool for scientists studying meiosis was the light microscope, so the various stages of prophase i were given names based only on what could be seen this way. Mitosis is a type of cellular reproduction where a cell will produce an identical replica of itself with the same number and patterns of genes and chromosomes.
During meiosis in humans, 1 diploid cell (with 46 chromosomes or 23 pairs) undergoes 2 cycles of cell division but only 1 round of dna replication the result is 4 haploid daughter cells known as gametes or egg and sperm cells (each with 23 chromosomes – 1 from each pair in the diploid cell. The stages of meiosis 1 and 2 are as follows: prophase i, metaphase i, anaphase i, telophase i, cytokinesis, prophase ii, metaphase ii, anaphase ii, telophase ii and cytokinesis again. The program goes on to a detailed description of all the stages of meiosis i and ii including prophase i and ii, metaphase i and ii, anaphase i and ii, and telophase i and ii. Prophase ii is the stage of meiosis when the nuclear membrane breaks apart and the spindle apparatus is formed it is the first stage of the second meiotic division (meiosis ii) and follows telophase i. Prophase 1 and 2 are the two initiating phases of the meiosis 1 and meiosis 2, respectively prior to the prophase 1, a long interphase can be identified in the cell cycle , synthesizing necessary proteins for the cell division and increasing the number of organelles in the cell.
Meiosis is a cell division process that occurs in two stages, resulting in the formation of four haploid gametes the two stages of meiosis are meiosis i and meiosis ii each stage is further divided into another four phases, details of which we will discuss in this article. In prophase i of meiosis, the replicated homologous pair of chromosomes comes together in the process called synapsis, and sections of the chromosomes are exchanged you can see that after crossing over, the resultant chromosomes are neither entirely maternal nor entirely paternal, but contain genes from both parents. 1 prophase - the first stage of meiosis diakinesis - the final stage of the prophase of meiosis diplotene - the fourth stage of the prophase of meiosis leptotene - the first stage of the prophase of meiosis meiosis, miosis, reduction division - (genetics) cell division that produces reproductive cells in sexually reproducing organisms. Prophase 1 of meiosis is where the crossing-over occur each of the homologous chromosome line up side by side, forming tetrads while they lined up, segments of the chromosomes may be exchanged this process is important as it promotes genetic diversity as prophase 1 continues, the centrosomes move to opposite poles of the cell and spindle apparatus form.
Meiosis ii is a shorter and simpler process than meiosis i, and you may find it helpful to think of meiosis ii as “mitosis for haploid cells the cells that enter meiosis ii are the ones made in meiosis i. Explain meiosis meiosis is a two round cell division process where a diploid cell divides into four haploid daughter cells the process is divided into two stages: meiosis i and meiosis ii meiosis i and ii are each divided into prophase , metaphase, anaphase, telophase and cytokinesis stages. In meiosis 1, the number of chromosomes is reduced by one-half and for this reason, it is called reduction division meiosis 2 results in separation the sister chromatids and for this reason, it is known as equatorial division. Learn meiosis 1 prophase with free interactive flashcards choose from 500 different sets of meiosis 1 prophase flashcards on quizlet.