Zygotene: The chromosomes further shorten and thicken at this. In metaphase, chromosomes align along the center plane of the cell known as the metaphase plate. In prophase, chromosomes migrate toward the cell center. The four phases are Prophase, Metaphase, Anaphase, and Telophase. Prophase is the starting stage of cell division in eukaryotes. If a membrane has formed around the chromosomes at the end of the first division, it disappears during prophase II. Prophase 1: Leptotene: The chromosomes condense, and it becomes visible under the microscope. Anaphase is the third of four phases of mitosis. During prophase II, the individual chromosomes of the daughter cells become distinct again and begin to prepare for the second meiotic division.
At the beginning of prophase II of meiosis, which occurs after telophase during the first meiotic division, the chromosomes of each daughter cell are grouped together in a mass. In mitosis, by contrast, pairs of homologous chromosomes remain separate and there is no crossing over, since the purpose of mitosis is to produce cells with identical genetic material rather than gametes. This process creates genetic diversity among the gametes formed through meiosis. Beginning after interphase, DNA has already been replicated when the cell enters. In prophase I of meiosis, pairs of homologous chromosomes intertwine and the process called crossing over occurs as chromatids from homologous pairs of chromosomes swap genetic information. Prophase is the first stage of cell division in both mitosis and meiosis. the first stage of mitosis or meiosis in eukaryotic cell division, during which the nuclear envelope breaks down and strands of chromatin form. The prophase of meiosis occurring during the first meiotic division of the cell is usually called prophase I.
The mechanism of crossing over consists of four sequential steps such as synapsis, tetrad formation. However, there are important distinctions between prophase of mitosis and prophase of meiosis. It occurs during pachytene of prophase I of meiosis. One of the two stages in meiosis that resemble prophase in mitosis. Assign cell images or diagrams to the correct phase (prophase, metaphase, anaphase, telophase, cytokinesis, or interphase).
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