Chromosomal crossover in meiosis I (video) |. Khan Academy. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *. Crossing Over JordanBiology, Eighth Edition (Raven) Chapter 11: Sexual Reproduction and Meiosis Meiosis with Crossing Over. You will notice that, in our diagrammatic representations of crossing-over in this chapter, we have shown crossovers taking place at the four-chromatid stage of meiosis. Amazon.com: Crossing Over: Harrison Ford, Ashley Judd, Ray Liotta, Jim Sturgess, Cliff Curtis, Summer Bishil, Alice Braga, Alice Eve, Jacqueline Obradors, Justin Chon. Crossing over is a basic concept of genetics and cell biology, often called recombination. It occurs during meiosis. Crossing over involves the exchange of chromosome.
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