The pair of chromosomes that are similar in structure is called ________ chromosomes.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe a pair of chromosomes that are similar in structure.

2. **Identifying the Key Concept**: In genetics, chromosomes come in pairs, and when they are similar in structure and carry the same genes, they are referred to by a specific term.

3. **Defining the Term**: The correct term for a pair of chromosomes that are similar in structure is "homologous chromosomes."

...