Question
In: Biology
Describe what happens in each of the following phases: Metaphase of Mitosis Metaphase I of Meiosis...
Describe what happens in each of the following phases:
- Metaphase of Mitosis
- Metaphase I of Meiosis I
- Metaphase II of Meiosis II
- Anaphase of Mitosis
- Anaphase I of Meiosis I
- Anaphase II of Meiosis II
Solutions
Expert Solution
In metaphase of mitosis, chromosomes gets arranged at the centre of the cell on the metaphase plate with sister chromatids on either side of the plate. The mitotic spindle line up the chromosomes at the centre , and they are ready to divide.
In metaphase 1 of meiosis I, homologous pair of chromosomes (bivalents) are arranged at two parallel metaphase plate at the centre of the cell. They are attached to the fully formed meiotic spindle.So that two copies of chromosomes are found in the two daughter cells of meiosis I. Kinetochore microtubules from each pole are attached to kinetochore of chromosomes.
In metaphase 2 of meiosis II, the spindle fibres again draws the chromosomes to the centre in two daughter cells produced from the first meiosis. The arrangement of chromosomes on the single plane at the centre in the preparation of centromeres to divide. Kinetochores are pointing towards the opposite poles.
In anaphase of mitosis, newly replicated chromosomes break at the centromeres and sister chromatids move to opposite ends of the pole by spindle fibres.
In anaphase 1 of meiosis I , two chromosomes from each bivalent split and move towards opposite poles of the cell by meiotic spindle. Sister chromatids remain attached at the centromeres.
In anaphase 2 of meiosis II , the centromeres divide and the spindle fibers seperate and pull the chromatids to opposite poles.
gladiator answered 1 year agoRelated Solutions
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