Describe the following

1. Synapsis
2. Bivalent
3. Chiasmata.

Draw diagrams to illustrate your answer.

1. Synapsis: It occurs in zygotene stage. It is pairing of homologous chromosomes. It may be centric or random or preterminal.

2. Bivalent : A pair of homologous chromosomes is called bivalent.

3. Chiasmata : It is point in a tetrad where crossing over occurs.