What is the significant change during metaphase 1 ?

Explanation

### Step-by-Step Solution:

1. **Understanding Metaphase I**: Metaphase I is a stage in meiosis, specifically during the first meiotic division. It is crucial to differentiate it from metaphase in mitosis.

2. **Chromosome Alignment**: During metaphase I, homologous chromosomes (pairs of chromosomes, one from each parent) align at the metaphase plate. This is different from mitosis, where individual chromosomes align.

3. **Formation of Double Metaphase Plate**: The significant change during metaphase I is the formation of a double metaphase plate. This occurs because both chromosomes of each homologous pair are aligned at the equator of the cell.

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