What is crossing over why is it important in genetics?

MeiOSis is the process by which most organisms produce gametes that are used in reproduction with half the number of chromosomes of a normal somatic cell. During the first stage of MeiOSis, Prophase I, there is a homologous chromosome for every chromosome that codes for the same traits but may have genes that code for a different form of that trait. Without crossing over, each new generation would inherit an identical set of chromosomes from each parent. During crossing over however, two homologous chrosomes will connect via a chiasma at the same region along each chrosome to form a tetrad. Once joined, genetic mateiral from one chromosome is traded with another, forming chromsomes with a mix of traits from both parent chromosomes. This process allows for increased diversity and is necessary for the maintainance of an evolving society.