What happens during synapsis in meiosis? gametes fertilize dna replicates nuclei divide tetrads form

tetrads form

Explanation:

In meiosis, during Profase I the chromosome pairs become visible with long thin filaments. As in mitosis, they were already duplicated during the preceding interphase, thus consisting of two chromatids joined by the centromere. However, at this stage, the degree of condensation is such that they look like single structures.

The homologous chromosomes pair very precisely, which starts at various points and then progresses like a zipper that closes, forming what is called tetrads. This pairing (which is the synapse) is critical for meiosis to occur, so this phenomenon cannot occur in haploid cells.

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