The sudden variations in genetic makeup appearing in a particular generation are called _________.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes sudden variations in genetic makeup that occur in a specific generation.

2. **Identifying the Concept**: The concept we need to focus on is genetic variation. This refers to changes in the genetic information of organisms.

3. **Defining the Term**: The specific term that describes sudden variations in genetic makeup is "mutation."

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