Table of Contents
What do spindle Fibres attach to?
centromeres
Spindle fibers move chromosomes during cell division by attaching to chromosome arms and centromeres. A centromere is the specific region of a chromosome where duplicates are linked. Identical, joined copies of a single chromosome are known as sister chromatids.
Where does the spindle attach to?
As mitosis progresses, the microtubules attach to the chromosomes, which have already duplicated their DNA and aligned across the center of the cell. The spindle tubules then shorten and move toward the poles of the cell. As they move, they pull the one copy of each chromosome with them to opposite poles of the cell.
Where do spindle fibers attach to the DNA?
centromere
The spindle fibers from the other side of the cell attach to the other sister chromatids in the chromosome. They attach at a point called the kinetochore, which is a disk or protein that is on each side of the centromere. The spindle fibers will move the chromosomes until they are lined up at the spindle equator.
What is the role of spindle fibers in mitosis apex?
Spindle fibers are used during mitosis to attach to sister chromatids and pull them apart into the two newly forming cells.
Do spindle always attach to kinetochores?
During this “reductional” division, sister kinetochores are always attached by spindle microtubules that originate from the same pole (monopolar attachment; Figure 1). A key question that remains is how monopolar attachment occurs at the kinetochore in meiosis I.
Which phase do spindle fibers attach?
metaphase
During metaphase, spindle fibers attach to the centromere of each pair of sister chromatids (see Figure below). The sister chromatids line up at the equator, or center, of the cell.
During which phase do the spindle fibers attach to the chromosomes?
Metaphase
Metaphase follows prophase. During metaphase, the chromosomes align in the center of the cell at the equatorial plate and the spindle fibers attach to the centromeres of the chromosomes.
What is the role of the spindle fibers during mitosis group of answer choices?
What is the most significant role of the spindle fibers during mitosis? The spindle fibers help separate the chromosomes.
What will spindle fibers eventually be used for?
The main function of the spindle fibres is to pull the chromosomes apart.
When do the spindle fibers attach to the chromosome?
In prophase of mitosis, specialized regions on centromeres called kinetochores attach chromosomes to spindle fibers. The centromere is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore.
What proteins are attached to spindle fibers in mitosis?
The centromere is also where protein complexes called kinetochores are found. Kinetochores generate fibers that attach sister chromatids to spindle fibers. Kinetochore fibers and spindle polar fibers work together to separate chromosomes during mitosis and meiosis.
Do spindle fibers attach to sister chromatids?
The spindle fibersfrom the other side of the cell attachto the other sister chromatids of the chromosome. They attach ata point called the kinetochore, which is a disk or protein that is on each side of the centromere. The spindle fibers willmove the chromosomes until they arelined up atthe spindleequator.