Genetics Hardest Trivia Questions! Quiz

40 Questions | Total Attempts: 326

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Genetics Hardest Trivia Questions! Quiz

Have you just finished chapter four in your genetics course and think that you were a hundred percent attentive? The quiz below is considered the hardest a student may come across, and for those that can tackle it, no exam can be difficult for them. Do you think that you have what it takes? Give it a shot and share your score.


Questions and Answers
  • 1. 
    In humans SRY is the male determining gene.  
    • A. 

      True

    • B. 

      False

  • 2. 
    Female mammals that are heterozygous for an X-linked gene have patches of cells that express one allele and patches of cells that express the other.  
    • A. 

      True

    • B. 

      False

  • 3. 
    The cellular reason for X-inactivation is to reduce the amount of nondisjunction during meiosis.  
    • A. 

      True

    • B. 

      False

  • 4. 
    The condition XXXY is always lethal in humans.  
    • A. 

      True

    • B. 

      False

  • 5. 
    The condition of having no X chromosomes, for example YO, is lethal in humans.  
    • A. 

      True

    • B. 

      False

  • 6. 
    Temperature during embryonic development determines sex in reptiles like turtles and alligators.  
    • A. 

      True

    • B. 

      False

  • 7. 
    In species in which females are the homogametic sex, gender of offspring is determined by the male.  
    • A. 

      True

    • B. 

      False

  • 8. 
    A female with androgen insensitivity may have XY sex chromosomes rather than XX.  
    • A. 

      True

    • B. 

      False

  • 9. 
    Species in which individuals have only male or only female reproductive structures are called dioecious.  
    • A. 

      True

    • B. 

      False

  • 10. 
    The X and Y chromosomes are named after their characteristic shape.  
    • A. 

      True

    • B. 

      False

  • 11. 
    Red-green color blindness is X-linked recessive. A woman with normal color vision has a father who is color blind. The woman has a child with a man with normal color vision. Which phenotype is NOT expected?  
    • A. 

      A color blind female

    • B. 

      A color blind male

    • C. 

      A non-color blind female

    • D. 

      A non-color blind male

  • 12. 
    If a female Drosophila that is heterozygous for a recessive X-linked mutation is crossed to a wild-type male, what proportion of female progeny will have the mutant phenotype?  
    • A. 

      100%

    • B. 

      0%

    • C. 

      33%

    • D. 

      25%

  • 13. 
    In a germ-line cell from a female grasshopper (XX-XO sex determination system), when do the homologous X chromosomes segregate?  
    • A. 

      During mitosis

    • B. 

      During meiosis I, anaphase

    • C. 

      During meiosis II, anaphase

    • D. 

      They do not segregate; gametes contain a copy of X and a copy of Y

  • 14. 
    In a germ-line cell from a human male that is dividing, when do the X and Y chromosomes segregate?  
    • A. 

      During mitosis

    • B. 

      During meiosis I, anaphase

    • C. 

      During meiosis II, anaphase

    • D. 

      They do not segregate; gametes contain a copy of X and a copy of Y

  • 15. 
    A eukaryotic diploid cell from an organism with the ZZ-ZW sex determination system has two pairs of autosomes and a pair of sex chromosomes, Z and W, shown below.  The individual from which this cell came is    
    • A. 

      Male

    • B. 

      Female

    • C. 

      Hermaphrodite

    • D. 

      Monoecious

  • 16. 
    A eukaryotic diploid cell from an organism with the ZZ-ZW sex determination system has two pairs of autosomes and a pair of sex chromosomes, Z and W, shown below.   A cell from this individual begins to go through meiosis. As it goes through meiosis II, it becomes two cells. Which of the following is a possible combination A - a B -- - b  of chromosomes in one of the two cells when it goes through metaphase of meiosis II?  
    • A. 

      One chromosome with A allele, one with B allele, one Z, one W

    • B. 

      One chromosome with A allele, one with a allele, one with B allele, one with b allele, one Z, one W

    • C. 

      A pair of sister chromatids with A allele, a pair of sister chromatids with B allele, a pair of sister chromatids Z, a pair of sister chromatids W

    • D. 

      A pair of sister chromatids with a allele, a pair of sister chromatids with B allele, a pair of sister chromatids W

    • E. 

      C and D are both possible

  • 17. 
    A eukaryotic diploid cell from an organism with the ZZ-ZW sex determination system has two pairs of autosomes and a pair of sex chromosomes, Z and W, shown below. What is the probability of a gamete from this individual that has the following genotype: alleles and b, chromosome Z?  
    • A. 

      1/2

    • B. 

      1/4

    • C. 

      1/6

    • D. 

      1/8

  • 18. 
    A eukaryotic diploid cell from an organism with the ZZ-ZW sex determination system has two pairs of autosomes and a pair of sex chromosomes, Z and W, shown below. Assume A and B are dominant alleles. If this individual were crossed to an individual of genotype Aa Bb, what is the probability of a female offspring with the two dominant traits given by alleles A and B?  
    • A. 

      1/8

    • B. 

      1/16

    • C. 

      9/16

    • D. 

      9/32

  • 19. 
    A eukaryotic diploid cell from an organism with the XX-XO sex determination system has two pairs of autosomes and one X chromosome, shown below. The individual from which this cell came is a:
    • A. 

      Male

    • B. 

      Female

    • C. 

      Hermaphrodite

    • D. 

      Monoecious

  • 20. 
    A eukaryotic diploid cell from an organism with the XX-XO sex determination system has two pairs of autosomes and one X chromosome, shown below. A cell from this individual begins to go through meiosis. When the cell reaches meiosis II, it becomes two cells. Which of the following is a possible combination of chromosomes in one of the two cells when it goes through metaphase of meiosis II?  
    • A. 

      One chromosome with A allele, one with B allele, and two X chromosomes

    • B. 

      One chromosome with A allele, one with a allele, one with B allele, one with b allele, and two X chromosomes

    • C. 

      A pair of sister chromatids with A allele, a pair of sister chromatids with B allele

    • D. 

      A pair of sister chromatids with a allele, a pair of sister chromatids with B allele, a pair of sister chromatids X

    • E. 

      C and D are both possible

  • 21. 
    A eukaryotic diploid cell from an organism with the XX-XO sex determination system has two pairs of autosomes and one X chromosome, shown below. What is the probability of a gamete from this individual that has the following genotype: alleles A and b, chromosome X?  
    • A. 

      1/2

    • B. 

      1/4

    • C. 

      1/6

    • D. 

      1/8

  • 22. 
    Which of the following human genotypes is associated with Klinefelter syndrome?  
    • A. 

      XXY

    • B. 

      XXYY

    • C. 

      XXXY

    • D. 

      All of the above

    • E. 

      None of the above

  • 23. 
    A Barr body is a(n)  
    • A. 

      Gene on the X chromosome that is responsible for female development.

    • B. 

      Patch of cells that has a phenotype different from surrounding cells because of variable X inactivation.

    • C. 

      Inactivated X chromosome, visible in the nucleus of a cell that is from a female mammal.

    • D. 

      Extra X chromosome in a cell that is the result of nondisjunction.

    • E. 

      Extra Y chromosome in a cell that is the result of nondisjunction

  • 24. 
    If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type female, what proportion of the progeny will be mutant males?  
    • A. 

      0%

    • B. 

      100%

    • C. 

      75%

    • D. 

      50%

    • E. 

      25%

  • 25. 
    List three dosage compensation strategies for equalizing the amount of sex chromosome gene products.  
    • A. 

      Inactivation of one sex chromosome in the homogametic sex

    • B. 

      Halving the activity of genes on both sex chromosomes in the homogametic sex

    • C. 

      Increasing the activity of genes on the sex chromosome in the heterogametic sex

    • D. 

      Not listed

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