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Topic : Genetics Aim : Describe multiple alleles and explain the inheritance of blood types.

Topic : Genetics Aim : Describe multiple alleles and explain the inheritance of blood types. Do Now : Review HW : Ditto – Reproductive Systems Review (BOTH SIDES!!!). What is structure A? How was it produced? 2. Which structures represent cleavage? 3. What is structure E?

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Topic : Genetics Aim : Describe multiple alleles and explain the inheritance of blood types.

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  1. Topic: Genetics Aim: Describe multiple alleles and explain the inheritance of blood types. Do Now: Review HW: Ditto – Reproductive Systems Review (BOTH SIDES!!!)

  2. What is structure A? How was it produced? • 2. Which structures represent cleavage? • 3. What is structure E? • 4. What is structure F? • 5. What process occurs after structure F is formed?

  3. One dog carries the heterozygous black fur trait and the other carries homozygous recessive white traits. What are the chances of having a puppy with black fur?

  4. B b B = Black fur b = White fur Bb x bb Chance of having a puppy with black fur: 50% b B b b b b B b b b

  5. Yellow is dominant in flowers & white is recessive. A white flower and a heterozygous yellow flower are crossed. Determine the percentage of white offspring.

  6. Multiple Alleles More than 2 alleles for a trait Skin color, blood type, height…

  7. Blood Types A, B, AB, O A & B genes = dominant O = recessive

  8. Blood Type A genotype • AA (pure) • AO (hybrid)

  9. Blood Type B genotype • BB (pure) • BO (hybrid)

  10. Blood Type AB genotype • AB

  11. Blood Type O genotype • OO

  12. Example #1: Cross a person with blood type AB with someone who has blood type O. AB X OO

  13. A B • AB x OO • 50% blood type A O A O B O • 50% blood type B O A O B O

  14. Example #2: Cross a person who is hybrid for type B with someone who has blood type O. BO X OO

  15. B O • BO x OO • 50% blood type B O B O O O • 50% blood type O O B O O O

  16. Example #3: Cross a person who is hybrid for blood type A with someone who is hybrid for blood type B AO X BO

  17. A O • AO x BO • 25% blood type AB B A B B O • 25% blood type A O A O O O • 25% blood type B • 25% blood type O

  18. Example #4: Cross a person who has blood type AB with someone who is hybrid for blood type B. AB X BO

  19. A B • AB x BO • 25% blood type AB B A B B B • 25% blood type A O A O B O • 50% blood type B

  20. So in order to conceive a child with type O, what must both parents be carrying?

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