👉 Subcrossing, also known as cross-over crossing (COX), is a phenomenon where a single chromosome in a cell divides into two separate chromosomes. This process can occur during meiosis I or II stages of mitosis. In general, subcrossing occurs when a single chromosome from one cell of a diploid organism splits into two separate segments. These segments are then either merged (coalesced) with the other segment to form a new homologous pair (subclonal) in
