Here's why:

* Meiosis I: Metaphase I is a stage within the first meiotic division (Meiosis I). Meiosis I is the division that separates homologous chromosomes.

* Homologous Chromosomes: Homologous chromosomes are pairs of chromosomes, one from each parent. They carry the same genes but may have different versions (alleles) of those genes.

* Diploid: Diploid cells have two sets of chromosomes (2n). Before Meiosis I, the cell is diploid.

* Metaphase I: During Metaphase I, the homologous chromosome pairs line up at the center of the cell. While the chromosomes are duplicated (each chromosome has two sister chromatids), the cell remains diploid because the homologous pairs are still together.

It's only after Meiosis I is complete that the daughter cells become haploid.

Let me know if you have any more questions!