The incidence of Down syndrome will be high (nearly 50%) among the offspring of a parent with Down syndrome. Diagram meiosis in the Down syndrome parent to explain why progeny have such a high risk for chromosome 21 aneuploidy. Explain in addition why the incidence of Down syndrome among these children might be less than 50%

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Q: Results of X chromosome nondisjunction Select all of the following that can result from…

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Q: Draw a simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome.

A: To draw: A simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome

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A: please follow steps 2 & 3 for detailed explanation.

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A: Paracentric inversion does not include centromere.

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Q: Draw a haploid mitosis of the genotype a+ ; b.

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.