CREATED ON 28th July 2017
COMPLETED ON 31st July 2017
Expert hired: ProfSandie1

Discussion Essay: Mitochondrial Eve, Humanity's Mother?

Objectives: Develop your understanding of the characteristics and the metabolic and hereditary roles of two organelles – the nucleus and the mitochondria. Use internet resources to investigate the differences between nuclear inheritance (genes in the nucleus) and mitochondrial inheritance (genes in the mitochondria). Summarize the “mitochondrial Eve” hypothesis. Alignment: This discussion question is designed to be answered with the materials presented in Chapters 4, 5, and 6 (Weeks 4-6) where you will be learning more about the structure of the cell, the function of different organelles, and metabolism. You will be focusing on the nucleus and the mitochondria in order to develop your understanding of the structure and function of these two types of organelles. Then you will learn about how scientists have used their biological understanding of the difference between how the nucleus and mitochondria are passed to offspring to further our understanding of human evolution. Background: Most of us are familiar with the idea that our genes (DNA) are located in the nuclei of our cells. We also know that when we reproduce (sexually reproduce) two parents contribute genetic information to make the nucleus of the first cell of the offspring. In other words, the sperm contributed by the father combines with the egg contributed by the mother to produce a cell called a zygote which will undergo cell division to make the new offspring. However, did you know that mitochondria also have genes (DNA)? These genes are important for producing proteins that help us with energy metabolism. Defects in these genes have been correlated with several diseases. (See for more information.) If the nucleus in the first cell of the offspring (the zygote) comes from a combination of the genetic material of the egg and the sperm, where do the mitochondria in the first cell (zygote) come from? You’ll be answering this as you investigate mitochondrial and mitochondrial inheritance. Procedure: Describe the structure and function of the nucleus and mitochondria. Use internet resources to learn more about the structure and function of both mitochondria and nuclei. (Structure includes shape, number of membranes, special structures. Function includes the job that the organelle does in the cell.) Differentiate between the way nuclear DNA (genes in the nucleus) and mitochondrial DNA (genes in the mitochondria) are inherited. Use internet resources to learn more about how nuclei and mitochondria are inherited. A quick internet search of “how are mitochondrial genes inherited” will give you lots of matches. Summarize the “Mitochondrial Eve” hypothesis. Use internet resources to find more information and support your summary with specific details to explain how scientists use their understanding of mitochondrial to identify a common ancestor of the human race.
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28 July 2017
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28 July 2017
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28 July 2017
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31 July 2017
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31 July 2017
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31 July 2017
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