4Facts: previous knowledge 1.Male sex cell is called the __________2. Female sex cell is called the __________3. All body cells have ________ chromosomes; sex cells have _____ each so when they join together there will be a full set of 46
5Animals: Sexual Reproduction 1. Animals, some plants, fungi, protists2. 2 parents= male & female3. Sex cells (Gametes)Male= spermFemale= eggSexual Reproduction in Animals
25Asexual Reproduction Methods Binary Fission1. Bacteria2. Organism divides in half3. 2 identical daughter cells produced (half the size of their parent)4. Daughter grows to parental size- then divides
35Comparing Asexual & Sexual Reproduction Create a T-chart to compare the following:How many parents?Are sex cells needed?What numbers of chromosomes are involved? (at the beginning and at the end)Are offspring different from or identical to parents and why?What types of organisms?
36What are the advantages of each: Asexual-Sexual-
37ANSWERS: ADV. Sexual- variation in traits evolution asexual- no mate neededDISADV.
38Comparing Reproduction Types ASEXUAL46 --> 46One parentCells produced are identical to the parent- no gene mixingNoSome plants, animals, and fungiSEXUAL> 46Two parentsCells produced are different from their parents- due to gene mixingYesBacteria, amoeba, algae, growing plants, animals, and fungi
39WebsitesAnimal Reproduction AnimationsAnimal Life Cycles