![]() ![]() In telophase, the spindle fibers disperse as the chromosomes are separated and become housed within distinct new nuclei. Spindle fibers not connected to chromatids lengthen and elongate the cell. What happens to spindle fibers not connected to chromatids? At metaphase, the chromosomes (green) line up along the center of the cell, and the spindle fibers (purple) grow from their poles to the centromeres (yellow), at the center of each chromosome. This is a fluorescence micrograph of a cell during metaphase of mitosis. What does this micrograph show during metaphase of mitosis? Spindle fibers that don’t contact chromosomes during cell division extend from one cell pole to the other. Kinetochore fibers and spindle polar fibers work together to manipulate and separate chromosomes during mitosis and meiosis. How do spindle fibers and kinetochore fibers work together? Spindle fibers function similarly in meiosis, where four daughter cells are formed instead of two, by pulling homologous chromosomes apart after they have been duplicated to prepare for division. They migrate throughout the cell and direct chromosomes to go where they need to go. Spindle fibers are highly active during mitosis. What is the function of the spindle fibers in mitosis? The centrioles and spindle fibers begin to form at opposite poles of the cell. During prophase, the nuclear envelope and nucleolus are dissolved and the chromosomes condense. Prophase is the first stage of mitosis, during which the cell begins to position itself in order to separate the chromatids and divide. The centromere is the point of attachment of the kinetochore, a structure to which the microtubules of the mitotic spindle become anchored. … that holds together the two chromatids (the daughter strands of a replicated chromosome). What holds the spindle together in the cell during mitosis?Ĭentromeres. ![]() During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers. Do spindle fibers attach in prophase or metaphase?ĭuring prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes ( sister chromatids ). This is also known as the metaphase plate. The sister chromatids line up at the equator, or center, of the cell. During metaphase, spindle fibers attach to the centromere of each pair of sister chromatids (see Figure below). Spindles extend from centrioles on each of the two sides (or poles) of the cell, attach to the chromosomes and align them, and pull the sister chromatids apart. What are the fibers that stretch across the cell and attach to the chromatids? At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Meanwhile, during meiosis, the spindle fibers are referred to as the meiotic spindle. 7 What happens to spindle fibers not connected to chromatids?ĭuring mitosis, the spindle fibers are called the mitotic spindle.6 How do spindle fibers and kinetochore fibers work together?.5 What is the function of the spindle fibers in mitosis?.4 What holds the spindle together in the cell during mitosis?.3 Do spindle fibers attach in prophase or metaphase?.2 What are the fibers that stretch across the cell and attach to the chromatids?.
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