What are SAT chromosomes?

Explanation

### Step-by-Step Solution:

1. **Definition of SAT Chromosomes**:
SAT chromosomes are also known as satellite chromosomes. The term "SAT" is an abbreviation for "satellite."

2. **Characteristics of SAT Chromosomes**:
- SAT chromosomes are identified by the presence of a secondary constriction. This secondary constriction is a specific region on the chromosome that is distinct from the primary constriction, which is the centromere.

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