Science - Genetics And Heredity

10 Questions | Total Attempts: 1212

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Science - Genetics And Heredity

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Questions and Answers
  • 1. 
      Which type of reproduction produces the most variation.
    • A. 

      Sexual

    • B. 

      Asexual

    • C. 

      Homosexual

    • D. 

      None of the above

  • 2. 
      How many alleles are present for one trait in normal cells?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 3. 
    Which one of the following represents a genotype?
    • A. 

      Brown eyes

    • B. 

      3:1 ratio

    • C. 

      Bb

    • D. 

      Sexual reproduction

  • 4. 
      Which one of the following represents a phenotype?
    • A. 

      Blue eyes

    • B. 

      Bb

    • C. 

      3:1 ratio

    • D. 

      Asexual reproduction

  • 5. 
      In the following cross Tt x Tt, what chance will the offspring have of being tt?
    • A. 

      100%

    • B. 

      50%

    • C. 

      25%

    • D. 

      0%

  • 6. 
      If blue eyes is recessive and a person has blue eyes, then the trait is…
    • A. 

      Dominant

    • B. 

      Hybrid

    • C. 

      Pure

    • D. 

      A mutation

  • 7. 
      Which of the following genotypes is hybrid for a single trait?
    • A. 

      BB

    • B. 

      BBtt

    • C. 

      Bbtt

    • D. 

      Bb

  • 8. 
    Which of the following is true about alleles?
    • A. 

      They are the same as chromosomes.

    • B. 

      Each allele in a pair may carry different information.

    • C. 

      Both alleles in a pair must carry the same information.

    • D. 

      None of the above

  • 9. 
      Which one of these is a possible sex cell produced by TtRR?
    • A. 

      Tt

    • B. 

      RR

    • C. 

      TR

    • D. 

      Tr

  • 10. 
    If B = Brown eyes and b=blue eyes, what are the odds that a child whose parents are Bb x Bb will have brown eyes?
    • A. 

      100%

    • B. 

      75%

    • C. 

      25%

    • D. 

      0%