Unit 7 Target 3: Alleles Quiz

8 Questions | Total Attempts: 474

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Unit 7 Target 3: Alleles Quiz


Questions and Answers
  • 1. 
    In humans, pigmented skin is dominant to non-pigmented skin (albinism).  What is the genotype of an individual with albinism?
    • A. 

      Carrier

    • B. 

      Heterozygous

    • C. 

      Homozygous dominant

    • D. 

      Homozygous recessive

  • 2. 
    The principle of dominance states that
    • A. 

      All alleles are dominant.

    • B. 

      All alleles are recessive.

    • C. 

      Some alleles are dominant and others are recessive.

    • D. 

      Alleles are neither dominant nor recessive.

  • 3. 
    Organisms that have two identical alleles for a particular trait are said to be
    • A. 

      Hybrid.

    • B. 

      Homozygous.

    • C. 

      Heterozygous.

    • D. 

      Dominant.

  • 4. 
    If a pea plant has a recessive allele for green peas, it will produce
    • A. 

      Green peas if it also has a dominant allele for yellow peas.

    • B. 

      Both green peas and yellow peas.

    • C. 

      Green peas if it does not also have a dominant allele for yellow peas.

    • D. 

      Yellow peas if it does not also have a dominant allele for green peas.

  • 5. 
    Genotype is the
    • A. 

      Physical appearance of the trait.

    • B. 

      Genetic make-up of the trait.

    • C. 

      None of the answer choices.

    • D. 

      Both of the answer choices.

  • 6. 
    Phenotype is the
    • A. 

      Physical appearance of the trait.

    • B. 

      Genetic make-up of the trait.

    • C. 

      None of the answer choices.

    • D. 

      Both of the answer choices.

  • 7. 
    If a tall plant (T) is dominant to a short plant (t), what would the genotype be for tall plants?
    • A. 

      TT

    • B. 

      Tt

    • C. 

      Tt

    • D. 

      TT and Tt

    • E. 

      TT, Tt, and tt

  • 8. 
    If a tall plant (T) is dominant to a short plant (t), what would the plant's phenotype be if it was Tt?
    • A. 

      Tall height

    • B. 

      Medium height

    • C. 

      Short height

    • D. 

      Tall and short height

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