Genetics Final Exam

100 Questions | Total Attempts: 3049

SettingsSettingsSettings
Please wait...
Genetics Final Exam

You might wonder why it’s so important to analyze the small, seemingly insignificant details of a person’s genetic make-up. But what you might not realize is that some things about ourselves can’t be seen by the naked eye – like a person’s chances of developing a terminal illness as a result of it being passed down from parent to offspring. What can you tell us about genetics?


Questions and Answers
  • 1. 
    In a pea plant that is heterozygous for seed color, what proportion of gametes will carry the recessive allele?
    • A. 

      1/4

    • B. 

      1/2

    • C. 

      1/3

    • D. 

      All of the gametes

    • E. 

      None of the gametes

  • 2. 
    A(n)                  gene masks the expression of a different, nonallelic gene.
    • A. 

      Imcompletely dominant

    • B. 

      Epistatic

    • C. 

      Recessive

    • D. 

      Codominant

    • E. 

      Hemizygous

  • 3. 
    The genetic material of eukaryotic cells is duplicated during which stage of cell cycle?
    • A. 

      M

    • B. 

      S

    • C. 

      G1

    • D. 

      G2

    • E. 

      None of the above

  • 4. 
    The appearance of traits expressed by genes in association with environmental influence is referred to as the organism's 
    • A. 

      Genome

    • B. 

      Karyotype

    • C. 

      Phenotype

    • D. 

      Genotype

    • E. 

      Prototype

  • 5. 
    A man with blood type A and a woman with blood type B could never produce a child with blood type
    • A. 

      A

    • B. 

      B

    • C. 

      AB

    • D. 

      O

    • E. 

      None of the above

  • 6. 
    In an interacting gene pair, the gene whose expression is masked by another gene is the         gene.
    • A. 

      Epistatic

    • B. 

      Homostatic

    • C. 

      Hypostatic

    • D. 

      Hyperstatic

    • E. 

      Limnostatic

  • 7. 
    In human males, genes on the X chromosome are
    • A. 

      Homozygous

    • B. 

      Heterozygous

    • C. 

      Homogametic

    • D. 

      Heterogametic

    • E. 

      Hemizygous

  • 8. 
    A Barr body is an
    • A. 

      Active X chromosome

    • B. 

      Inactive Y chromosome

    • C. 

      Inactive X chromosome

    • D. 

      Active Y chromosome

  • 9. 
    The basic structure of nucleotide includes the following components
    • A. 

      Amino acids

    • B. 

      Base, sugar, phosphate

    • C. 

      Tryptophan and leucine

    • D. 

      MRNA, rRNA, tRNA

    • E. 

      Phosphorus and sulfur

  • 10. 
    Bacterial Recombination requires?
    • A. 

      F pilus

    • B. 

      Plasmid

    • C. 

      Physical contact

    • D. 

      All of the above

    • E. 

      None of the above

  • 11. 
    The two major components of Tobacco Mosaic Virus are?
    • A. 

      DNA and RNA

    • B. 

      RNA and Protein

    • C. 

      DNA and Protein

    • D. 

      Lipids and nucleic acids

    • E. 

      Carbohydrates and nucleic acids

  • 12. 
    Which of the following enzymes initiate chain synthesis on a template during replication? 
    • A. 

      DNA pol I

    • B. 

      DNA pol II

    • C. 

      DNA pol III

    • D. 

      RNA pol II

    • E. 

      Primase

  • 13. 
    Assume that a cross is made between tall and dwarf tobacco plants.  The F1 generation showed intermediate height, while the F2 generation showed a distribution of height ranging from tall to dwarf, like the original parents, and many heights between the extremes.  These data are consistent with the following mode of inheritance:
    • A. 

      Multiple-factor inheritance

    • B. 

      Alternation of generations

    • C. 

      Codominance

    • D. 

      Incomplete dominance

    • E. 

      Hemizygosity

  • 14. 
    Given the sequence 5’-AGTTACCTGA-3’ what would be the sequence of the complementary DNA strand?
    • A. 

      5’-TCAATGGACT-3’

    • B. 

      3’-AGTTACCTGA-5’

    • C. 

      5’-AGTTACCTGA-3’

    • D. 

      3’-TCAGGTAACT-5’

    • E. 

      5’-TCAGGTAACT-3’

  • 15. 
    If the percentage of uracil in a double-stranded RNA molecule is 30%, the percentage of cytosine is?
    • A. 

      20%

    • B. 

      10%

    • C. 

      30%

    • D. 

      60%

    • E. 

      40%

  • 16. 
    In a double-stranded RNA molecule of 10,000 base pairs, the approximate number of complete turns is?
    • A. 

      3000

    • B. 

      15,000

    • C. 

      1000

    • D. 

      300

    • E. 

      30

  • 17. 
    Hershey and Chase differentiated between DNA and protein by:
    • A. 

      Labeling the DNA with 14Carbon, proteins with 3Hydrogen

    • B. 

      Labeling the DNA with 35Sulfur, proteins with 32Phosphorous

    • C. 

      Labeling the DNA with cesium, proteins with chloride

    • D. 

      Labeling the DNA with 32Phosphorous, proteins with 35Sulfur

    • E. 

      All of the above

  • 18. 
    What is the name for the statistical measure used to describe sample variability
    • A. 

      Mean

    • B. 

      Standard Error

    • C. 

      Variance

    • D. 

      Median

    • E. 

      Covariance

  • 19. 
    For a species with a diploid number of 18 chromosomes, how many chromosomes will be present in the somatic nuclei of individuals that are tetraploid?
    • A. 

      9

    • B. 

      27

    • C. 

      36

    • D. 

      18

    • E. 

      72

  • 20. 
    ________ results when chromatids fail to separate and move to opposite poles during anaphase. 
    • A. 

      Nondisjunction

    • B. 

      Transposition

    • C. 

      Translocation

    • D. 

      Duplication

    • E. 

      Segregation

  • 21. 
    The recombination frequency between three genes can be used to calculate
    • A. 

      Actual distance between genes

    • B. 

      Gene order

    • C. 

      Number of tetrads

    • D. 

      All of the above

    • E. 

      None of the above

  • 22. 
    The phenomenon of crossovers in nearby regions is called
    • A. 

      Chiasma

    • B. 

      Negative Interference

    • C. 

      Reciprocal genetic exchange

    • D. 

      Positive Interference

    • E. 

      Mitotic recombination

  • 23. 
    The mating system in E.coli is known as?
    • A. 

      Lysogeny

    • B. 

      Lysis

    • C. 

      Conjugation

    • D. 

      Integration

    • E. 

      Transduction

  • 24. 
    The transfer of bacterial genes from one cell to another requires?
    • A. 

      F factor

    • B. 

      F plasmids

    • C. 

      F + cell

    • D. 

      All of the above

    • E. 

      None of the above

  • 25. 
    Which of the following is a nonhistone protein found in chromatin? 
    • A. 

      H1

    • B. 

      HMG

    • C. 

      H2A

    • D. 

      H3

Related Topics
Back to Top Back to top