When there are two haploid nuclei per cell in some fungi before the formation of diploid, this stage is called

Options

A. Diplotene
B. Diplophase
C. Dikaryophase
D. Dikaryote

Answer

To solve the question, we need to identify the stage in fungi where there are two haploid nuclei present in a single cell before they fuse to form a diploid nucleus. Let's break down the solution step by step:

### Step 1: Understand the Context
In fungi, particularly in some groups like Ascomycetes, there is a unique reproductive phase where two haploid nuclei coexist in the same cell. This is important for their life cycle.

**Hint:** Focus on the reproductive cycle of fungi and the terminology used for different stages.

### Step 2: Define Key Terms
- **Haploid Nuclei:** These are nuclei that contain a single set of chromosomes (n).
- **Karyogamy:** This is the process of fusion of two nuclei.
- **Dicaryon:** This term refers to a cell that contains two haploid nuclei.

**Hint:** Remember the definitions of karyogamy and dicaryon as they are crucial for understanding the question.

### Step 3: Identify the Stage
In the context of the question, the presence of two haploid nuclei in a single cell before they fuse indicates a specific phase in the fungal life cycle. This phase is known as the **Dicaryophase**.

**Hint:** Look for terms that describe the presence of two nuclei in a single cell in fungi.

### Step 4: Choose the Correct Option
Given the options:
- A) Diplotene
- B) Diplophase
- C) Dicaryophase
- D) Dicariot

The correct answer is **C) Dicaryophase**, as it specifically refers to the stage where two haploid nuclei are present in one cell.

**Hint:** Cross-reference the terms with their definitions to ensure you select the correct one.

### Final Answer:
The stage when there are two haploid nuclei per cell in some fungi before the formation of diploid is called **Dicaryophase**.