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AP Bio Ch 12 Chromosome & Genes

13 Questions
AP Biology Quizzes & Trivia

Ch 12 Outline quiz

Questions and Answers
  • 1. 
    A classical example of codominance is
    • A. 

      ABO blood groups in humans.

    • B. 

      Height in garden peas.

    • C. 

      Pink flowers in heterozygous snapdragons.

    • D. 

      Coat color in rabbits.

    • E. 

      Albinism in humans and animals.

  • 2. 
    A classical example of epistasis is
    • A. 

      ABO blood groups in humans.

    • B. 

      Height in garden peas.

    • C. 

      Pink flowers in heterozygous snapdragons.

    • D. 

      Coat color in rabbits.

    • E. 

      Albinism in humans and animals.

  • 3. 
    Marfan's disease in humans, with its numerous effects, is an example of
    • A. 

      Dominance modification.

    • B. 

      Incomplete dominance.

    • C. 

      Epistasis.

    • D. 

      Pleiotropy.

    • E. 

      Polygenic inheritance.

  • 4. 
    A classical example of multiple alleles is
    • A. 

      Coat color spotting in cattle.

    • B. 

      Height in garden peas.

    • C. 

      Pink flowers in heterozygous snapdragons.

    • D. 

      Coat color in rabbits.

    • E. 

      Albinism in humans and animals.

  • 5. 
    What causes Down syndrome?
    • A. 

      The lack of pigment production

    • B. 

      An extra chromosome 21

    • C. 

      The presence of two different codominant alleles

    • D. 

      Inability to produce normal connective tissue

    • E. 

      The environment interacting with the genotype

  • 6. 
    What is the hereditary cause of type AB blood?
    • A. 

      The lack of pigment production

    • B. 

      An extra chromosome 21

    • C. 

      The presence of two different codominant alleles

    • D. 

      Inability to produce normal connective tissue

    • E. 

      The environment interacting with the genotype

  • 7. 
    Skin color in humans, caused by several genes at several loci, is an example of
    • A. 

      Multiple alleles at one locus.

    • B. 

      Incomplete dominance.

    • C. 

      Epistasis.

    • D. 

      Pleiotropy.

    • E. 

      Polygenic inheritance.

  • 8. 
    A human male has ____ chromosomes with ____ sex chromosomes.
    • A. 

      46, XY

    • B. 

      48, XY

    • C. 

      46, XX

    • D. 

      48, XX

    • E. 

      48, YY

  • 9. 
    In chromosome mapping, one map unit represents
    • A. 

      The distance between one gene and the next on a chromosome.

    • B. 

      1% crossing over between two sites on a chromosome.

    • C. 

      1% of the length of the chromosome.

    • D. 

      10% crossing over between two sites on a chromosome.

    • E. 

      10% of the length of the chromosome.

  • 10. 
    In a case of incomplete dominance, the phenotypic ratio of the F2 generation is the same as the genotypic ratio.
    • A. 

      True

    • B. 

      False

  • 11. 
    Different pairs of recessive alleles can interfere with a biochemical pathway and thus produce albinism.
    • A. 

      True

    • B. 

      False

  • 12. 
    A small number of recombinants will occur due to crossing over between linked genes on homologous chromosomes.
    • A. 

      True

    • B. 

      False

  • 13. 
    Trisomy occurs when a chromosome, usually an autosome, is lost during meiosis.
    • A. 

      True

    • B. 

      False