Multiple choice

Metaphase I is characterized by orientation of bivalents where

  1. limbs of chromosomes lie at equator and centromeres towards poles

  2. limbs lie towards poles and centromeres at equator

  3. limbs and poles both lie towards poles

  4. limbs and poles both lie at equator
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In mitosis: 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).

Keep practicing — related questions