Question

What are the amphiastral spindle and anastral spindle?

Answer 1

Spindle:

1. A spindle is a group of minute fibers made up of microtubules that are visible during cell division.
2. Chromosomes are segregated to the daughter cells during cell division (either mitosis or meiosis), which is its purpose.

Amphiastral spindle:

1. The amphiastral spindle is a spindle-shaped development in a growing ovum that has radiations at each end, resembling two conjoined star-shaped figures.
2. Animals with a spindle that has two asters, one at each pole, are said to be amphiastral.

Anastral spindle:

1. Anastral spindles lack centrosomes at the poles and assemble using a method distinct from traditional mitotic spindles.
2. Anastral is found in plants in which the spindle has no aster.