Name different types of post-mating isolating mechanisms.

Explanation

### Step-by-Step Text Solution

1. **Understanding Post-Mating Isolation Mechanisms**:
Post-mating isolation mechanisms are reproductive barriers that occur after mating has taken place but prevent the successful production of viable offspring. These mechanisms ensure that even if mating occurs, it does not lead to the formation of healthy, fertile offspring.

2. **Types of Post-Mating Isolating Mechanisms**:
- **Gametic Mortality**: This occurs when the sperm cannot successfully fertilize the egg due to incompatibility. For example, the sperm may not be able to penetrate the egg's outer layer, preventing fertilization from occurring.

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