Question

What structure is most important in forming the tetrads?

a. centromere

b. synaptonemal complex

c. chiasma

d. kinetochore

Short answer

The correct answer is option b

Step-by-step solution

Step 1. Introduction

During Prophase I tetrad formation takes place. Tetrad contains four sister chromatids.

Step 1. The explanation for the correct option

Option b is correct because the Tetrad arrangement of chromosomes is mediated by a protein lattice called the synaptonemal complex. It is formed during early prophase I of meiosis I. It helps to bind the chromatin of the homologous chromosomes.

Step 3. The explanation for the incorrect options

Option a is incorrect because chromosomes are attached to the synaptonemal complex and by cohesion protein at the centromere. The Synaptonemal complex is most important in the arrangement of tetrads.

Option c is incorrect because tetrads are bound together at the chiasmata. The Synaptonemal complex is most essential in forming the tetrads.

Option d is incorrect because the synaptonemal complex is most important in the arrangement of tetrads.