Onion root tip cells have 16 chromosomes in each cell. Can you tell how many chromosomes will the cell have at `G_1` phase, after S phase, and after M phase? Also, what will be the DNA content of the cells at `G_1`, after S, and at `G_2`. If the content after M phase is 2C ?`

Explanation

To solve the question regarding the chromosome number and DNA content in onion root tip cells during different phases of the cell cycle, we will break it down step by step.

### Step-by-Step Solution:

1. **Understanding the Initial Condition**:
- The onion root tip cells have 16 chromosomes in each cell. This is the starting point for our analysis.

2. **Chromosome Number in G1 Phase**:
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