Describe the following:
Bivalent
Draw a diagram to illustrate your answer.

Explanation

### Step-by-Step Text Solution

**Step 1: Definition of Bivalent**
A bivalent, also known as a tetrad, refers to a structure formed by the pairing of two homologous chromosomes during meiosis. Each homologous chromosome consists of two sister chromatids, resulting in a total of four chromatids in the bivalent structure.

**Step 2: Formation of Bivalents**
Bivalents are formed during a specific phase of meiosis called zygotene, which is part of prophase I. During this stage, homologous chromosomes undergo a process known as synapsis, where they align closely together.

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