question_answer

A. The plane of alignment of chromosome during metaphase is known as metaphase plate.

B. Chromosome move towards equator during metaphase.

C. Two kinetochore are present on one centromere during metaphase.

A) All three are correct

B) A and B are true

C) Only A is true

D) None of the above

Correct Answer: A

Solution :

  These structures serve as the sites of attachment of spindle fibres (formed by the spindle fibres) to the chromosomes that are moved into position at the centre of the cell. Hence, the metaphase is characterised by all the chromosomes coming to lie at the equator with one chromatid of each chromosome connected by its kinetochore to spindle fibres from one pole and its sister chromatid connected by its kinetochore to spindle fibres from the opposite pole. The plane of alignment of the chromosomes at metaphase is referred to as the metaphase plate. The key features of metaphase are: Spindle fibres attach to kinetochores of chromosomes. Chromosomes are moved to spindle equator and get aligned along metaphase plate through spindle fibres to both poles.