Assertion: Small disc-shaped structures at the surface of the centromeres are called kinetiochores.
Reason: Kinetochores serve as the sites of attachement of spindle fibres to the centreomeres.

Assertion: Small disc-shaped structures at the surface of the centromeres are called kinetochores. Reason: Kinetochores serve as the sites of attachement of spindle fibres to the centreomeres.

Small disc shaped structures at the surface of centromeres are called chiasmata.

Small disc shaped structures at the surface of centromeres are called chiasmata.

Read the following statement? (A) Two sister chromatids are held together by centromere. (B) small disc shaped structure at the surface of centromere are called as kinetochore (C) These structures serve as site attachment of spindle fibres to chromosome

Assertion :- Kinetochore is essential for cell division. Reason:- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Disc-like structure formed on centromere for attachment of spindle fibres

Point of attachment of chromosomal fibre of spindle is kinetochore/centromere.