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Earn 100

Which one of the following is the significance of mitosis?
(a)Cell repair
(b)Restricted to haploid cells
(c)Increases the genetic variability
(d)Recombination of chromosomes
(e)Leads to evolution of new genotypes

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Important Questions on Cell Cycle and Cell Division
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A) Cells of the lining of the gut are replaced by mitotic division constantly
B) Formation of liquid endosperm takes place, if karyokinesis is not followed by cytokinesis
C) In telophase, the chromosomes reach the poles and condenses to form the chromatic network
D) In quiescent stage, the cell is metabolically inactive.

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During metaphase, spindle fibres attach to ________.
Centromeres split and chromatids __________ during __________.

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(A) The stage between two meiotic divisions is called interphase
(B) During zygotene, the pairing of homologous chromosomes and synapsis takes place.
(C) Initiation of mitotic spindle takes place during metaphase
(D) In animals, mitotic cell division takes place in diploid somatic cells and not in haploid cells

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Reason (R): Mitosis divides a parent cell into two daughter cells

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(i) Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements
(ii) Nuclear envelope assembles around the chromosome clusters
(iii) Nucleolus, Golgi complex and ER reform

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