What event immediately precedes anaphase? a. the nuclear envelope forms around chromatin b. chromosomes clusters at the midline of the cell c. DNA replicates d. the mitotic spindle forms
The Stages of Mitosis and Cell Division
The main event of anaphase is chromatid separation towards the opposite poles of the cell. This event occurs with the sister chromatid of metaphase which requires huge amount of energy. The migration of chromatids (daughter chromosomes) continues till the reach to the end of the poles. Cytokinesis initiates at the end of anaphase.
The key difference between anaphase I and anaphase II is that during the anaphase I, the homologues chromosomes are pulled apart and move apart to opposite ends of the cell while during the anaphase II, sister chromatids of each chromosome are separated and are pulled towards the poles. Furthermore, anaphase I occur when the cell is in the diploid state while the anaphase II occurs when the cell is in the haploid state.
Anaphase 1 and anaphase 2 are two phases in the meiotic division of cells which produces gametes during the sexual reproduction. The main difference between anaphase 1 and 2 is that homologous chromosomes are separated during anaphase 1 whereas sister chromatids are separated during anaphase 2.
In meiosis, what is the difference between Anaphase I and Anaphase II? In Anaphase 1 , the homologous (same) chromosomes separate to either side of the cell, and the centromere is whole. In Anaphase 2, the sister chromatids separate, and the centromere is split, which causes the chromatids to separate.
Anaphase in meiosis Generally, anaphase I involve separating the chromosomes from each sister chromatid to the opposite poles still attached to the microtubules of the cell while anaphase 2 involves the actual split of the sister chromatids into single chromatids.
Anaphase II is the stage when sister chromatids of every chromosome separate and begin to move towards the opposite ends of the cell. The separation and the movement is due to the shortening of the kinetochore microtubules.
which of the following statements best describes the major difference between anaphase of mitosis and anaphase I of meiosis? in anaphase I, homologous pairs are separated but sister chromatids stay joined together. both mitosis and meiosis begin with a diploid cell that contains replicated chromosomes.
Metaphase 1 is associated with meiosis 1 whereas the metaphase 2 is associated with meiosis 2. The main difference between metaphase 1 and 2 is that chromosomes are attached as homologous pairs at the equator during the metaphase 1 and during metaphase 2, single chromosomes are attached at the equator.
In anaphase II, the sister chromatids separate and are pulled towards opposite poles of the cell.
Answer and Explanation: The event that occurs in both anaphase of mitosis and anaphase II of meiosis is the separation of sister chromatids.
Anaphase-1 of Meiosis has two steps, such as- Anaphase-1 and Anaphase-2. In anaphase of meiosis, spindle fibers affix to kinetochore of 2 chromosomes. The centromere does not divide. During anaphase I, the homologous chromosomes divide, while the chromatids stay attached at their centromeres.
During prophase II of meiosis II, four important steps occur. These are the condensing of chromatin into chromosomes, disintegration of the nuclear envelope, migration of centrosomes to either pole, and the reconstruction of the spindle apparatus. However, centrosomes are not present in all cells.
No, homologous chromosomes act independently from one another during alignment in metaphase and chromatid segregation in anaphase. Does crossing over occur? No, because chromosomes do not pair up (synapsis), there is no chance for crossing over.