Fertilization needs to occur approximately within 12-24 hours of the egg being released, otherwise, the egg becomes no longer viable. Fertilization occurs when a sperm penetrates the cell walls of the egg called the corona radiata...
How does meiosis occur? Compare and contrast meiosis and mitosis. In meiosis why are the chromatids that make up a chromosome in meiosis II identical? Is meiosis I or meiosis II most like mitosis? Explain why. Explain why mitosis can occur in a haploid cell, but meiosis can't. Explai...