This video provides a demonstration of differences between sexual reproduction, which involves recombination through meiosis, and asexual reproduction, which does not.
This animation shows how meiosis, the form of cell division unique to egg and sperm production, can give rise to sperm that carry either an X or a Y chromosome.
This playlist can be used to teach several core concepts in genetics and molecular biology by having students collect and interpret evidence to explain the biology of lactose intolerance. It can be used in a general high school biology course.