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Reproduction Can you guess whether the following organisms reproduce using sexual or asexual reproduction? Rats Sexual reproduction (internal) • Rats reproduce through internal sexual reproduction, which means that the egg is fertilized by the sperm inside of the female. Mosquitoes Sexual reproduction • Mosquitoes feed on nectar, but female mosquitoes need the iron from your blood to produce eggs, which the male then fertilizes. • Most things that produces eggs reproduce through sexual reproduction. hydra Asexual Reproduction • Hydras reproduce asexually through a process called “budding.” • Budding is when a small part of the parents body becomes a new individual. Bacteria Asexual reproduction • Bacteria reproduce asexually. • Bacteria are all single celled, so they simply divide in half using mitosis. • Movie Plant cuttings Asexual reproduction • Many plants can be “shared” by cutting off pieces and replanting them somewhere else. Salmon Sexual reproduction (external) • Salmon reproduce through sexual reproduction, but fertilization occurs outside of the females body. • The female deposits her eggs and the male deposits his sperm, and fertilizations occurs in the water. Mold Asexual reproduction • Mold reproduces asexually by forming spores that grow into new, genetically identical mold colonies. sunflowers Sexual reproduction • Almost all flowering plants reproduce sexually. • Pollen is the sperm and the egg is deep inside of the flower. • Insects help pass pollen from one plant to another, but some flowers can also selffertilize. Planaria Asexual • Planaria reproduce asexually through a process called fragmentation. • If a planaria is cut in half, a new one will grow from each half. • Starfish can also reproduce this way. Potato Both! • A potato can reproduce sexually or asexually. • So can strawberries. amoeba Asexual reproduction • Amoeba reproduce asexually using mitosis. • When a single cell divided using mitosis, it is called binary fission. butterfly Sexual Reproduction • Remember: If there are eggs involved, then it’s sexual reproduction Review: Asexual reproduction • Asexual reproduction: – Has only 1 parent – Uses mitosis – Produces offspring that are genetically identical to their parent. Review: Sexual reproduction • Sexual reproduction: – Has 2 parents – Involves an egg – Has males and females – Uses meiosis – Produces offspring that are genetically different than the parents.