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Genetics Case Study: The Royal Family
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The Romanov Family Romanov Empire included one-sixth of the globe.
Nicholas II became Czar of Russia in 1896 Resentment against the Czar and wealthy class begins at end of 19th century.
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Alexei Born in 1904, Nicholas’s only son.
Had hemophilia, a bleeding disorder. Had body guard with him at all times to prevent accidents. Alexei had several internal bleeding instances. These bleedings were stopped after the prayers of the healer Rasputin.
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Rasputin Healer or Scoundrel????
Alexandra (Alexei’s mom) called Rasputin in to stop Alexei’s bleeding. Alexandra took Rasputin in as a relative (which lowered public faith of the Romanov family). His influence on the Czar is arguable by historians. Assassinated by Russian aristocrats.
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Rasputin Rasputin was drugged, poisoned, and shot before he died of drowning in the Neva river
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End of the Empire July, 1918: Russian Revolution (Romanov’s assassinated) Alexei’s body missing from mass grave found in 1990’s.
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So what does this have to do with Genetics?
Learn how to read a PEDIGREE. Learn the inheritance pattern of HEMOPHILIA.
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Royal Family Pedigree
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Pedigrees Each row represents a generation
Genders represented by different shapes Affected individuals indicated by shading Carriers indicated by half shading Easy to see if: trait skips a generation (recessive) appears in both genders (autosomal)
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Sex-Linkage Traits controlled by genes located on the sex chromosomes are called sex-linked traits. The gene for a protein that helps blood clot is on the X chromosome. If this gene is mutated (deletion, point mutation, etc), it may cause HEMOPHILIA. Other sex-linked traits are red-green colorblindness, Duchenne muscular dystrophy, and Fragile X syndrome.
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