Which type of division leads to polyploidy :–

Options

A. Cryptomitosis
B. Meiosis
C. Endomitosis
D. Amitosis

Answer

To determine which type of division leads to polyploidy, let's analyze the options provided step by step.

### Step 1: Understand Polyploidy
Polyploidy is a condition in which an organism has more than two complete sets of chromosomes. This is common in plants and can result from various types of cell division.

**Hint:** Remember that polyploidy involves multiple sets of chromosomes beyond the typical diploid state.

### Step 2: Evaluate the Options
1. **Cryptomytosis**: This is a type of nuclear division characterized by a modified achromatic spindle. It does not lead to polyploidy.

**Hint:** Focus on the definition of cryptomytosis and its characteristics to see why it doesn't contribute to polyploidy.

2. **Meiosis**: This is a reductional division where the chromosome number is halved, producing gametes. Meiosis does not lead to polyploidy.

**Hint:** Recall that meiosis reduces the chromosome number, which is the opposite of what is needed for polyploidy.

3. **Endomytosis**: This is a type of division where the nucleus divides but the cytoplasm does not. This can lead to an increase in the number of chromosome sets, thus resulting in polyploidy.

**Hint:** Consider how endomytosis differs from typical cell division and how it affects chromosome numbers.

4. **Ermitosis**: This is an unusual form of cell division where the nucleus and cytoplasm divide by constriction. It does not lead to polyploidy.

**Hint:** Think about the mechanisms of ermitosis and how they do not contribute to an increase in chromosome sets.

### Step 3: Conclusion
Based on the analysis, the type of division that leads to polyploidy is **endomytosis**.

**Final Answer:** Endomytosis is the correct answer.