https://learn.concord.org/resources/655/meiosis
( https://authoring.concord.org/activities/1059/single_page/4f7624aa-0463-4fa3-8c76-3690e6f23adf )
In this activity, you will learn how meiosis (the formation of gametes) and fertilization (combining two gametes to form a fertilized zygote) shuffle the alleles that offspring inherit.
This activity runs entirely in a Web browser. Preferred browsers are: Google Chrome (versions 30 and above) Safari (versions 7 and above), Firefox (version 30 and above), Internet Explorer (version 10 or higher), and Microsoft Edge.
Performance Expectations
Heredity: Inheritance and Variation of Traits. Students who demonstrate understanding can: Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation.