Final answer:
In prophase I of meiosis, the homologous chromosomes are anchored in synapsis by the synaptonemal complex and cohesin proteins.
Step-by-step explanation:
In prophase I of meiosis, the homologous chromosomes come together to form a synapse and are bound tightly by a protein lattice called a synaptonemal complex.
In addition to the synaptonemal complex, there are other proteins that anchor the homologs in synapsis. Some of these proteins include the cohesin proteins, which are found at the centromere of the chromosomes. In prophase I of meiosis, the homologous chromosomes are anchored in synapsis by the synaptonemal complex and cohesin proteins.