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1. 2. Reproduction Compare and Contrast KEY Fill out the chart below. Answer the following question in at least 3 complete sentences. Which is most important or valuable to a living thing, mitosis or meiosis? Explain in at least 3 complete sentences. *justify your opinion here*__________________________________________________________________________________________________ ______________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________ Characteristic Type of Reproduction Asexual MITOSIS Sexual Types of organisms All – bacteria, protists, fungi, plants, animals, humans All – bacteria, protists, fungi, plants, animals, humans Uses Growth and development: grow new cells, replace old cells, repair damaged cells Make offspring: create new, unique organisms Types of Cells All cells except the sex cells The sex cells (gametes),sperm egg Number of Cells to Start 1 1 Number of Chromosomes in the First Cell Number of Cells Produced In humans, 46 In humans, 46 2 4 Interphase (DNA copied) Yes, exact copy unless mutation occurs Number of Chromosomes in Each New Cell DNA Characteristics In humans, 46 Yes, but then the cells split again separating the chromosomes so that ½ of the DNA goes into each of the final cells In humans, 23 Examples Binary fission in bacteria; regeneration in sea star; budding in plants; spores in mushrooms Benefits No mate needed; rapid re-population; no long term gestation Not diverse; offspring have the same DNA making all organism susceptible to the same diseases and disorders; lack of species adaptability Disadvantages Diversity in species means the species is more likely to survive Must have a mate; the zygote (fertilized egg takes a long time to develop (gestate) Exact copy unless mutation occurs MEIOSIS Yes, but then the cells split again separating the chromosomes so that ½ of the DNA goes into each of the final cells Pollinated flowers or cones in plants producing seeds; zygote produced in humans; eggs in a bird’s nest