Crossing Over: Function, Tasks, Role & Diseases

Crossing-over is the exchange of maternal and paternal chromosomes as it occurs during the prophase of meiosis. This piece exchange allows for the trait diversity of offspring. Errors in crossing-over cause diseases such as Wolf-Hirschhorn syndrome. What is crossing-over? Crossing-over is the exchange of maternal and paternal chromosomes that occurs during the prophase of meiosis. … Crossing Over: Function, Tasks, Role & Diseases