Animal Reproduction and Development
Fertilization
Ensures that an embryo (developing offspring) is protected and nourished until it leaves the body Increases the chance that it will survive, grow up, and reproduce
Fertilization#2
Fertilization that occurs inside the body of an animal A large majority of animals use internal fertilization Earthworms, Spiders, Insects, Reptiles, Birds, Mammals
Fertilization #3
The new cell that is formed after an egg cell is fertilized The Zygote then develops into a new organism over time
Fertilization #4
The joining of an egg cell with a sperm cell Genetic material is also known as DNA Half of the DNA comes from the egg, and the other half comes from sperm cell
Sexual Reproduction
The genetic material from two different cells produce an offspring Sperm Cell Egg Cell The majority of animals reproduce sexually If they do not reproduce sexually, they reproduce asexually This does not require a sperm and an egg cell joining