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Microtubules are the constituent of

  • spindle fibres, centrioles and cilia

  • centrioles, spindle fibres and chromatin

  • centrosome, nucleosomes and centrioles

  • cilia, flagella and peroxisomes

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

  • metaphase I

  • metaphase II

  • anaphase I

  • anaphase II

Which of the following is not a characteristic feature during mitosis in somatic cells?

  • Disappearance of nucleolus

  • Chromosome movement

  • Synapsis

  • Spindle fibres

The complex formed by a pair of synapsed homologous chromosomes is called

  • equatorial plate

  • kinetochore

  • bivalent

  • axoneme

Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

  • Chromosomes will not condense

  • Chromosomes will be fragmented

  • Chromosomes will not segregate

  • Recombination of chromosome arms will occur

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