Topic 7 - Keystone Sample Quiz

10 Questions | Total Attempts: 602

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Topic 7 - Keystone Sample Quiz

Mendelian & Human Genetics Content


Questions and Answers
  • 1. 
    Although all of the cells of a human develop from one fertilized egg, the human is born with many different types of cells. Which statement best explains this observation?
    • A. 

      Developing cells may express different parts of their identical genetic instructions.

    • B. 

      Different chromosomes are present in each cell.

    • C. 

      Mutations occur during development as a result of environmental conditions.

    • D. 

      Some cells develop before other cells.

  • 2. 
    Which process will increase variations that could be inherited?
    • A. 

      Mitotic cell division

    • B. 

      Active transport

    • C. 

      Recombination of genes

    • D. 

      Synthesis of proteins

  • 3. 
    Young birds that have been raised in isolation from members of their species build nests characteristic of their species. This suggests that the nest-building behavior is
    • A. 

      A disadvantage to the survival of the species

    • B. 

      Learned by watching members of their species

    • C. 

      Genetically inherited from parents

    • D. 

      A direct result of the type of food the bird eats

  • 4. 
    The flounder is a species of fish that can live in very cold water. The fish produces an "antifreeze" protein that prevents ice crystals from forming in its blood. The DNA for this protein has been identified. An enzyme is used to cut and remove this section of flounder DNA that is then spliced into the DNA of a strawberry plant. As a result, the plant can now produce a protein that makes it more resistant to the damaging effects of frost. This process is known as
    • A. 

      Sorting of genes

    • B. 

      Genetic engineering

    • C. 

      Recombination of chromosomes

    • D. 

      Mutation by deletion of genetic material

  • 5. 
    Which diagram best represents the relative locations of the structures in the list below? A–chromosome B–nucleus C–cell D–gene
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 6. 
    For centuries, certain animals have been crossed to produce offspring that have desirable qualities. Dogs have been mated to produce Labradors, beagles, and poodles. All of these dogs look and behave very differently from one another. This technique of producing organisms with specific qualities is known as
    • A. 

      Gene replication

    • B. 

      Natural selection

    • C. 

      Random mutation

    • D. 

      Selective breeding

  • 7. 
    Even though identical twins have the same genetic material, they may develop slightly different characteristics because
    • A. 

      Each twin receives different chromosomes from the egg

    • B. 

      One twin may only have genes from the father

    • C. 

      Gene expression may be influenced by factors that switch genes on and off

    • D. 

      A gene mutation may have occurred before the zygote divided

  • 8. 
    A chemical known as 5-bromouracil causes a mutation that results in the mismatching of molecular bases in DNA. The offspring of organisms exposed to 5-bromouracil can have mismatched DNA if the mutation occurs in
    • A. 

      The skin cells of the mother

    • B. 

      The gametes of either parent

    • C. 

      All the body cells of both parents

    • D. 

      Only the nerve cells of the father

  • 9. 
    The diagram below shows a normal gene sequence and three mutated sequences of a segment of DNA. Which row in the chart below correctly identifies the cause of each type of mutation?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 10. 
    At warm temperatures, a certain bread mold can often be seen growing on bread as a dark-colored mass. The same bread mold growing on bread in a cooler environment is red in color. Which statement most accurately describes why this change in the color of the bread mold occurs?
    • A. 

      Gene expression can be modified by interactions with the environment.

    • B. 

      Every organism has a different set of coded instructions.

    • C. 

      The DNA was altered in response to an environmental condition.

    • D. 

      There is no replication of genetic material in the cooler environment.

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