Question

Interzonal fibres occur in?

Answer 1

The centrioles are at opposite poles of the cell. The pairs of homologous chromosomes (the bivalents), now as tightly coiled and condensed as they will be in meiosis, become arranged on a plane equidistant from the poles called the metaphase plate. Spindle fibers from one pole of the cell attach to one chromosome of each pair (seen as sister chromatids), and spindle fibers from the opposite pole attach to the homologous chromosome (again, seen as sister chromatids). In metaphase I stage, the protein fibres are formed in between the centromeres of homologous chromosome. They are called interzonal fibres.