Metaphase is not characterized by
(A) Complete condensation of chromosomes
(B) Alignment of chromosomes on equatorial plate
(C) Attachment of spindle fibres to kinetochore
(D) Splitting of centromere and movement of sister chromatid towards to opposite poles
Answers
Answer:
A
Explanation:
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Answer:
The correct answer is option A and D
Explanation:
A. Interphase is the non dividing phase of cell cycle and is further subdivided into G1, S and G2 phase. In G1 phase, cell continues to grow, in S phase synthesis of DNA i.e. replication occurs and in G2 phase cell prepares for genomic separations.
B. In prophase, chromosomes shorten and thicken by coiling. Chromosomal material becomes untangled due to chromatin condensation. Centrioles move to opposite poles. Nuclear envelope and nucleolus disappear. Prophase is marked by condensation of chromatin fibers and presence of visible sister chromatids of each chromosome
C. In metaphase, spindle fibres get attached to kinetochores and bring the chromosomes on the equator of the spindle. The centromeres of all the chromosomes lie on the equator which forms a plate called metaphase plate. Metaphase is marked by alignment of duplicated chromosomes on the equatorial plate.
D. In anaphase, centromeres split into two and the spindle fibres pull the daughter centromeres to opposite poles. Anaphase is marked by splitting of centromere and contraction of spindle fibers which in turn move the sister chromatids towards the opposite poles.
E. Telophase is the last phase of Mitosis. The chromatids reach the poles of the cell, uncoil and lengthen to form chromatin again. Spindle fibres disintegrate and centrioles replicate. Nuclear envelope reforms around the chromosomes and cell organelles appear. Telophase leads into cytokinesis (cell division) and thus 2 daughter cells are formed at the end of mitosis. Telophase is marked by the presence of daughter chromatids at the opposite poles. Cytokinesis is the division of cytoplasm that takes place after karyokinesis.
Reference Link
- https://brainly.in/question/18433566
- https://brainly.in/question/4215052