Summary:
- Probability is the likelihood, or chance, that a certain event will occur.
- When you toss a coin, the chance of a head turning up is 50 percent.
- The more times you toss the coin, however, the closer you will get to 50 percent heads.
- The same rules of probability in coin tossing apply to the main events that determine the genotypes of offspring.
- These events are the formation of gametes during meiosis and the union of gametees during fertilization.