Question

The spindle fibers which extend from pole to kinetochores are

• A. Chromosomal or tractile
• B. Interzonal fibers
• C. Continuous fibers
• D. Astral rays

Answer 1

The correct option is A Chromosomal or tractile

The spindle fibres that are continuous from one pole to another pole of the cell are termed as continuous fibres while those extending from centromere of the chromosome to the pole are called as chromosomal spindle fibres. The spindle fibres present between centromeres of separating chromatids is termed in interzonal fibres. Microtubules that spread out from the centrosome in the opposite direction from the spindle itself are collectively termed as astral rays. So, the correct answer is option A.