Sexual reproduction involves the combining of a sperm cell and an egg cell from two individuals.
Organisms that are produced by crossing individuals with different traits are known as hybrids . In most cases, hybrid organisms are more successful than those that are produced from a very limited gene pool. This is sometimes called hybrid vigor . Principle of Segregation - The two factors for a characteristic separate during the formation of eggs and sperm. Principle of Independent Assortment - The factors for different characteristics are distributed to reproductive cells independently.