How meiosis and sexual reproduction lead to genetic variation

Explain (in complete sentences) how meiosis and sexual reproduction lead to genetic variation. In your response be sure to include: The purpose and why organisms got through the process. What the end result of meiosis is and how that leads to genetic variation? (Think to cross over) Why is meiosis necessary for sexual reproduction How does sexual reproduction lead to genetic variation? USE SCIENTIFIC VOCABULARY NO COPYING FROM THE INTERNET!!!!!!!