![]() Getting the sperm and egg together requires that the gametes be released at the same time and in the same location to increase the likelihood of fertilization (otherwise all those gametes are wasted!) How does that happen? Water protects the eggs from drying out during development. The information below is adapted from OpenStax Biology 43.2Įxternal fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water, a process called spawning. Fertilization can occur either inside ( internal fertilization) or outside ( external fertilization) the body of the female. Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. ![]() Differentiate between animal mating systems and predict relationships between these mating systems and sexual dimorphism or sperm competition.Explain the advantages of specific reproductive strategies that increase biological fitness (parental investment, male-male aggression, courtship rituals, mate guarding, copulatory plugs, etc).Define biological fitness, sexual selection, and sexual dimorphism, and explain why females are more likely than males to be “choosy” when selecting a mating partner. ![]() ![]()
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