Cell division 30

• Interphase is the stage before mitosis, during which the cell grows, replicates its DNA, and prepares for cell division.
• Anaphase is the third phase of mitosis, where sister chromatids separate from each other and move towards opposite poles of the cell, pulled apart by spindle fibers.
• Metaphase is the second phase of mitosis, where chromosomes line up along the equatorial plane of the cell, attached by their centromeres to spindle fibers.
• Prophase is the first phase of mitosis, where chromatin condenses into visible chromosomes, the nuclear envelope breaks down, and spindle fibers begin to form.
• G1 Phase - The first gap phase where the cell grows and synthesizes proteins needed for DNA replication.
• Interphase is the longest phase, during which the cell grows and prepares to divide.
• Metaphase: Chromosomes align down the center of the cell and attach to spindle fibers.
• The cell cycle is the series of events that occur between one cell division and another.
• Prophase: Cell prepares for division, chromosomes condense and align at cell's center.
• Prophase is the first stage of mitosis, during which the chromatin condenses into visible chromosomes.
• Interphase is the phase that occurs before mitosis, during which the cell grows, replicates its DNA, and prepares for cell division.
• Telophase is the fourth and final phase of mitosis, where new nuclear envelopes form around the two sets of daughter chromosomes at either end of the cell, and the cytoplasm divides to produce two identical daughter cells.
• Telophase is the final phase of mitosis, where new nuclei are formed at either end of the dividing cell, chromosomes uncoil back into chromatin, and the cytoplasm divides.
• Cytokinesis is the process that occurs between telophases, resulting in the formation of two genetically identical daughter cells.
• S Phase - The synthetic phase where DNA replication occurs.
• Telophase is the final phase of mitosis, where new nuclei are formed at either end of the dividing cell, and the cytoplasm divides to produce two identical daughter cells.
• Telophase: Spindle fibers pull chromosomes toward opposite ends of the cell, forming two new nuclei.
• Cytokinesis is the process that occurs between two successive rounds of mitotic divisions, resulting in the formation of two daughter cells with identical genetic material.
• Mitosis is an essential part of growth, development, repair, and reproduction in multicellular organisms.
• Mitotic Prophase - Chromatin condenses into visible chromosomes, the nucleolus disappears, and the nuclear membrane begins to break down.
• Mitosis is the process of cell division that results in two genetically identical daughter cells.
• Mitosis is the process of cell division that results in two genetically identical daughter cells with the same number of chromosomes as the parent cell.
• Prophase 1


  Chromatin condenses into chromosomes

  Synapsis - homologous chromosomes pair up - crossing over may occur (exchange of genetic material)
• Prophase 2


  Chromosomes visible

  Cells are n
• Metaphase 1

  Homologous pairs line up in middle of metaphase plate
• Metaphase 2

  Chromosomes line up in middle of plate

  One of each number n
• Anaphase 1


  Segregation - homologous pairs separate to opposite poles

  Chromosomes still replicated (sister chromatids at centremere)
• Anaphase 2


  Centromere splits

  Single chromosomes move apart in Segregation
• Telophase 1

  Cleavage furrow

  Replicated chromosomes reach pole
• Telophase 2

  Cleavage furrow

  4 haploid daughter cells formed
• Spermatogenesis

  Meiosis in testes to create sperm

  Meiosis 1 and 2 make 4 equal in size sperm
• Oogenesis

  Meiosis in ovaries and fallopian tube to create egg (ovum)

  Meiosis 1 and 2 create 1 egg and 3 polar bodies which get reabsorbed leaving 1 egg