Topic 4.2 & 10.1 Notes. Meiosis. A reduction in chromosomes to form HAPLOID cells. 2N to 1N. Homologous pairs . They associate with each other during prophase 1 through synapsis. Chromosomes replicate in which phase?. S phase!. Prophase 1.
Synapsis-the chromosomes associate
Crossing Over-The Chiasma are the points at which they cross over. A Holliday junction forms when they anneal.
This increases genetic diversity!