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4-3 Questions on Theoretical Genetics

Page history last edited by Jay 14 years, 2 months ago

 

  1. KNOW the required vocabulary (see assessment statements).
  2. See "Genetic Symbols" practice.
  3. Monohydrid cross
    1. What is a monohybrid cross?
    2. Make up and solve a cross between a heterozygous smooth pea plant and a homozygous wrinkled pea plant
      1. show parents using correct notation
      2. show all gamete possibilities using Punnet grid
      3. determine genotype and phenotype numbers and ratio
  4. Dihybrid cross [see Mendellian Genetics at the Biology Project page and your textbook]
    1. What is a dihybrid cross?
    2. Make up and solve a cross between a heterozygous smooth pea plant and a homozygous wrinkled pea plant
      1. show parent cross using correct notation
      2. show all gamete possiblities using Punnet grid
      3. determine genotype and phenotype numbers and ratios
  5. ABO blood typing [see wikipedia's blood typing page or Wayne's world's page.]
    1. What do the alleles represent; what do they indicate about a person's blood?  Fill in the table below:
      blood type  A B A-B

      O
      antigen present on RBC is ___                                                    
      antibody present in blood is ___        

      can receive blood from ____

      Note: when donating blood only RBC are donated; whole blood is not considered here and could not be used safely due to Ab-Ag interaction.

      		        
    2. What are the problems with mixing blood types?
    3. What is the name given to this kind of heritable pattern?
    4. Make up and solve a cross between someone with type AB blood and someone heterozygous for type B blood.
      1. show parents using correct notation [see Inheritance at Wikipedia]
      2. show all gaemete possiblities using Punnet grid
      3. determine genotye and phenotype numbers and ratios
    5. Make sure you can solve these blood type problems.
    6. Make up and solve a cross between a white snap dragon and a pink snapdragon (head to Wikipedia if you need a hand). Note that this is not a Mendellian trait.
      1. show parents using correct notation
      2. show all gamete possibilities using Punnet grid
      3. determine genotye and phenotype numbers and ratios
    7. note: "incomplete dominance" is not used as a term in this course
  6. Sex linked inheritance [see Mendellian Genetics at the Biology Project page and your textbook]
    1. How can you recognize a situation as probably caused by sex linkage?
    2. How do you represent the alleles in a sex linkage problem?
    3. What are examples of this kind of inheritance?
    4. Make up and solve a cross between a woman carrying the hemophilia gene and a man with hemophilia
      1. show parents using correct notation
      2. show all gaemete possiblities using Punnet grid
      3. determine genotye and phenotype numbers and ratios
  7. Gender determination (see text and cartoons on Mr. Reimer's website under "media," select "genetics")  If you cannot see letters on the webpage it is because your computer's default language is set to "korean."
    1. Genetically, what determines an organisms gender?
    2. Find at least 2 human conditions of abnormal of sex chromosome arrangement
      1. What are the conditions called/named?
      2. How does the chromosome arrangement differ from normal?
      3. When, in the life of a cell, does the accident causing this condition occur?
      4. Where does the accident causing this condition occur?
    3. In some organsisms, there is a different systems for determining gender.  (see cartoon and Wikipedia's "sex determination system" page.) 
      1. Describe three methods for determining gender which are different than the human XY system.
      2. Provide at least one specific organism name for each example.

 

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