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When do homologous chromosomes move towards opposite poles in meiosis?
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∙ 11y ago
In Anaphase I of meiosis.
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∙ 14y ago
Wiki User
∙ 11y agoanaphase 1
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Homologous chromosomes segregate towards opposite poles of a dividing cell during which stage?
meiosis I
During which phase of meiosis do spindle fibers move the sister chromitatdes to the center of cells?
That would be anaphase I of meiosis. We know the question is concerning meiosis and not mitosis because it involves homologous chromosomes. Anaphase I begins when the kinetochore fibers stemming from the centrioles "grab" the centromeres of homologous chromosomes and "pull" them towards opposite ends of the cell.The mechanisms are a little more complicated than "grabbing" and "pulling," but for this question the mechanisms are of little importance.
What is the Disjunction of homologous chromosomes to the opposite poles?
During anaphase, the centrosomes (which have moved to opposite poles of the cell) release microtubules from their centrioles which then pull the chromosomes towards them, the double stranded chromosomes then split at the centromere and thus each pole of the chromosome has a copy of every chromosome. I assume you're talking about meiotic division though and in this case the spindle fibres/ microtubules dont split the chromosomes in half, rather, the chromosomes line up in homologous pairs (instead of in single file) and the spindle fibres pull one of the entire homologous double stranded chromosomes to its designated pole.
What happens at the anaphase stage?
The chromosomes move apart, towards the opposite poles.
What causes the dancing of the chromosomes towards the opposite pole?
two method of the reproduction in plants
Homologous chromosomes segregate towards opposite poles of a dividing cell during which stage?
meiosis I
During which phase of meiosis do spindle fibers move the sister chromitatdes to the center of cells?
That would be anaphase I of meiosis. We know the question is concerning meiosis and not mitosis because it involves homologous chromosomes. Anaphase I begins when the kinetochore fibers stemming from the centrioles "grab" the centromeres of homologous chromosomes and "pull" them towards opposite ends of the cell.The mechanisms are a little more complicated than "grabbing" and "pulling," but for this question the mechanisms are of little importance.
What is the Disjunction of homologous chromosomes to the opposite poles?
During anaphase, the centrosomes (which have moved to opposite poles of the cell) release microtubules from their centrioles which then pull the chromosomes towards them, the double stranded chromosomes then split at the centromere and thus each pole of the chromosome has a copy of every chromosome. I assume you're talking about meiotic division though and in this case the spindle fibres/ microtubules dont split the chromosomes in half, rather, the chromosomes line up in homologous pairs (instead of in single file) and the spindle fibres pull one of the entire homologous double stranded chromosomes to its designated pole.
What happens at the anaphase stage?
The chromosomes move apart, towards the opposite poles.
What causes the dancing of the chromosomes towards the opposite pole?
two method of the reproduction in plants
What happens to duplicated chromosomes chromosomes during anaphase?
Anaphase 1: 1. Breakdown of proteins responsible for sister chromatid cohesion along chromatid arms allows homologs to separate. 2. The homologs move toward opposite poles, guided by the spindle apparatus. 3. Sister chromatid cohesion persists at the centromere, causing chromatids to move as a unit towards the same pole. At anaphase 1 of meiosis, the replicated chromosomes of each homologous pair move toward opposite poles, but the sister chromatids of each replicated chromosome remain attached. In anaphase of mitosis, by contrast, sister chromatids separate. Reference Cambell et al. Biology (8th Ed) 2008. Benjamin Cummings. pg 254-257
The chromosomes detach from one another and become visibly separated during?
The Anaphase stage of Mitosis. The proteins that bind the sister chromatids are split so they become seperated. Then the centromeres, along with the attached chromosomes, start to be pulled apart towards opposite ends of the cell.
Hwat are the stage of meiosis?
The stages of Mitosis are- The Begining- where everything in the cell is copied, including the DNA. Then the DNA is condensed into chromosomes. Phase 1 - The chromosomes begin to move towards the equator of the cell. Phase 2 - The chromosomes line up at the equator. Phase 3 - The cell starts to pull apart and the chromosomes split apart and move to opposite sides of the cell. Phase 4 - The chromosomes unravel to form DNA in the nucleus. Cytokinesis - The cytoplasm splits and the new cell membrane forms, this results in two new daughter cells.
When do chromosomes line up at the equator of a cell?
Chromosomes line up with their centromeres on the equator during metaphase of any eukaryotic cell division: mitosis, meiosis I, or meiosis II.During metaphase the arms of the chromosomes are spread out, but it will be the centromeres that lead the way towards the poles during anaphase. This is because in metaphase some spindle fibers, which are formed by the cytoskeleton, attach to the centromeres. It is the contraction of these fibers that pulls the chromosomes (daughter-chromosomes in mitosis and meiosis II) towards the poles in anaphase.There is an important checkpoint during metaphase. If the spindle fibers are not correctly attached, division should stop. However, a few mistakes slip through the net, and sometimes both daughter-chromosomes of a pair (in other words, a pair of former sister-chromatids) move to the same pole. This phenomenon is called non-disjunction, and leads to an abnormal number of chromosomes in both daughter-nuclei.
What is the role of the microtubules?
Microtubules attach to the to a structure on the sister chromatids called the kinetochore. Throwing the chromosomes into an agitated motion moving them towards the center of the cell. Then during anaphase they will help with the migration of chromosomes to opposite ends of the cell.
Describe the chromosome during prophase stage?
During prophase, the chromatin in the nucleus begins to condense to form chromosomes. Nuclear envelope and nucleolus dissolves. In meiosis, during early and middle prophase I of meiosis the chromosomes become distinct and rodlike. Also during early and middle prophase I of meiosis synapsis occurs. During late prophase I of meiosis the chromosomes become clearly double-stranded and the nuclear membrane begins to disappear.
What does a centride do?
A centride has spindle fibers attached to it that lengthen to reach the chromosomes. The centrides also move towards opposite ends of a cell around the middle of the cell cycle.
