Unit 7 Target 4: Mendel's Laws And Punnett Squares Quiz

17 Questions | Total Attempts: 380

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Unit 7 Target 4: Mendel


Questions and Answers
  • 1. 
    Two black guinea pigs bred and produced 3 black offspring and 2 albino offspring.  Assuming no mutations, which guinea pigs must be heterozygous?
    • A. 

      All 3 black offspring

    • B. 

      Exactly 2 of the black offspring

    • C. 

      Both albino offspring

    • D. 

      Both parents

  • 2. 
    Which example best illustrates Mendel's law of independent assortment?
    • A. 

      Two short-haired cats produce a litter of 4 kittens including 1 long-haired and 3 short-haired.

    • B. 

      A color-blind man and a woman with normal vision produce a son with normal vision and a color-blind daughter.

    • C. 

      A tall purple-flowered pea plant and a short white-flowered pea plant are crossed, producing offspring including tall white-flowered pea plants.

    • D. 

      A red-flowered snapdragon and a white-flowered snapdragon are crossed, producing offspring with pink flowers.

  • 3. 
    The manner in which chromosomes separate into gametes during meiosis is the molecular mechanism behind which of Mendel's laws, if either?
    • A. 

      Law of independent assortment only

    • B. 

      Law of segregation only

    • C. 

      Both the law of independent assortment and the law of segregation

    • D. 

      Neither the law of independent assortment and the law of segregation

  • 4. 
    Which event of meiosis reveals the mechanism for understanding Mendel's law of segregation and independent assortment?
    • A. 

      Chromosomes number is reduced during telophase I so gametes have half the standard number of chromosomes.

    • B. 

      The arrangement of homologous chromosomes during metaphase I varies from cell to cell.

    • C. 

      Centromeres break apart during anaphase II so that sister chromatids can move to opposite poles of the cell.

    • D. 

      DNA is replicated during interphase before chromosomes condense and become attached to kinetochores.

  • 5. 
    The passing of traits from parents to offspring is called
    • A. 

      Genetics.

    • B. 

      Heredity.

    • C. 

      Development.

    • D. 

      Maturation.

  • 6. 
    The law of segregation states that
    • A. 

      Alleles of a gene separate from each other during meiosis.

    • B. 

      Different alleles of a gene can never be found in the same organism.

    • C. 

      Each gene of an organism end up in a different gamete.

    • D. 

      Each gene is found on a different molecule of DNA.

  • 7. 
    A punnett square shows all of the following EXCEPT
    • A. 

      All possible results of a genetic cross.

    • B. 

      The genotypes of the offspring.

    • C. 

      The alleles in the gametes of each parent.

    • D. 

      The actual results of a genetic cross.

  • 8. 
    In humans, having freckles (F) is dominant to not having freckles (f). The inheritance of these traits can be studied using a Punnett square similar to the one shown below.Refer to the illustration above.  The child represented in box 1 in the Punnett square would
    • A. 

      Be homozygous for freckles.

    • B. 

      Have an extra freckles chromosome.

    • C. 

      Be heterozygous.

    • D. 

      Not have freckles.

  • 9. 
    Refer to the illustration above.  Which box in the Punnett square represents a child who does NOT have freckles?
    • A. 

      Box 1

    • B. 

      Box 2

    • C. 

      Box 3

    • D. 

      Box 4

  • 10. 
    Refer to the illustration above.  The child in box 3 of the Punnett square has the genotype
    • A. 

      FF

    • B. 

      Ff

    • C. 

      Ff

    • D. 

      FfFf

  • 11. 
    Linked genes
    • A. 

      Are never separated.

    • B. 

      Assort independently.

    • C. 

      Are on the same chromosome.

    • D. 

      Are always recessive.

  • 12. 
    When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
    • A. 

      An allele for tallness from each parent.

    • B. 

      An allele for tallness from the tall parent and an allele for shortness from the short parent.

    • C. 

      An allele for shortness from each parent.

    • D. 

      An allele from only the tall parent.

  • 13. 
    In the P generation, a tall plant is crossed  with a short plant.  The probability that an F2 plant will be tall is
    • A. 

      50%

    • B. 

      75%

    • C. 

      25%

    • D. 

      100%

  • 14. 
    Complete a punnett square for a heterozygous tall plant crossed with a homozygous tall plant.  Which of the following is true about the offspring resulting from the cross?
    • A. 

      About half are expected to be tall.

    • B. 

      All are expected to be short.

    • C. 

      All are expected to be tall.

    • D. 

      About half are expected to be short.

  • 15. 
    In rabbits, black fur (B) is dominant to brown fur (b).  Consider the following cross between two rabbits.Refer to the illustration above.  The device shown, which is used to determine the probably outcome of genetic crosses, is called a 
    • A. 

      Mendelien box.

    • B. 

      Punnett square.

    • C. 

      Genetic graph.

    • D. 

      Phenotypic paradox.

  • 16. 
    In rabbits, black fur (B) is dominant to brown fur (b).  Consider the following cross between two rabbits.Refer to the illustration above.  Both of the parents in the cross are
    • A. 

      Black.

    • B. 

      Brown.

    • C. 

      A mixture of brown and black.

    • D. 

      White.

  • 17. 
    In rabbits, black fur (B) is dominant to brown fur (b).  Consider the following cross between two rabbits.Refer to the illustration above.  The phenotype of the offspring indicated by box 3 would be
    • A. 

      Brown.

    • B. 

      Black.

    • C. 

      A mixture of brown and black.

    • D. 

      White.

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