Genetics Warm Up 2

25 Questions | Total Attempts: 162

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Genetics Warm Up 2

I would like to welcome you to the electronic classroom for biology and life sciences of the 21st century. Todays, geneticists rely on Gregory Mendel's work to predict the likely outcome of genetic crosses. This instrument will test your knowledge of vocabulary and principles to solve genetic problems. As "fill-in" questions appear in this test, please enter your answers using all lower case letters. Unless, the question has printed a different set of instructions. I wish you good luck and make high marks on the test!


Questions and Answers
  • 1. 
    Mendel obtained plant that were true-breeding for particular traits by...
    • A. 

      Growing plants from seed of other plants that displayed traits.

    • B. 

      Discarding plants that showed other traits.

    • C. 

      Allowing plants to self-pollinate for several generations.

    • D. 

      Allowing plants to cross-pollinate for several generations.

    • E. 

      Allowing plants to self-pollinate for one generation.

  • 2. 
    When Mendel crossed a strain of tall pea plants with a strain of short pea plants, he observed that all of the plant in the F1 generation were tall. This suggests that...
    • A. 

      A tall trait was controlled by a dominant factor

    • B. 

      A short trait was controlled by a dominant factor

    • C. 

      Both traits were controlled by a recessive factor

    • D. 

      Strain of short plants was not capable of pollinating tall plants

  • 3. 
    The F1 generation consists of the offspring of a cross between...
    • A. 

      One parent and one offspring

    • B. 

      One parent and F2 offspring

    • C. 

      Two parents

    • D. 

      Two parents and one F1 offspring

  • 4. 
    A cross between pure-breeding green-podded pea plant and a homozygous yellow-pod pea plant produces only green-podded plants. When the F1 generation is allow to self-pollinate, the F2 generation consists of:
    • A. 

      Only green-podded plants

    • B. 

      Only yellow-podded plants

    • C. 

      75% yellow-podded plants and 25% green-podded plants

    • D. 

      75% green-podded plants and 25% yellow-podded plants

    • E. 

      50% yellow-podded plants and 50% green-podded plants

    • F. 

      85% light green podded plants and 15% dark green podded plants

  • 5. 
    The appearance of an organism is called_____.
    • A. 

      Genotype

    • B. 

      Phenotype

    • C. 

      Genotypic ratio

    • D. 

      Phenotypic ratio

    • E. 

      Homozygous phenotype

    • F. 

      Heterozygous genotype

  • 6. 
    _____ is the passing of traits from parents to their offspring.
    • A. 

      Heredity

    • B. 

      Genetics

    • C. 

      Alleles

    • D. 

      Law of Segregation

    • E. 

      Monohybrid Cross

  • 7. 
    Genetics is the branch of biology that studies heredity.
    • A. 

      True

    • B. 

      False

  • 8. 
    _____ _____ is a cross that considers one pair of contrasting traits.
    • A. 

      Monohybrid cross

    • B. 

      Dihybrid Cross

    • C. 

      Trihybrid Cross

    • D. 

      Incomplete Cross

    • E. 

      Allele Cross

  • 9. 
    _____ occurrs when all the offspring display only one form of a particular trait.
    • A. 

      Heredity

    • B. 

      True-breeding

    • C. 

      Cross-breeding

    • D. 

      Codominance breeding

  • 10. 
    _____ is the first two individuals crossed in a breeding experiment.
    • A. 

      F 1 Generation

    • B. 

      F 2 Generation

    • C. 

      P Generation

    • D. 

      F Generation

    • E. 

      O Generation

  • 11. 
    F 2, generation is the offspring of the P generation.
    • A. 

      True

    • B. 

      False

  • 12. 
    F 1, generation is the offspring of the P generation.
    • A. 

      True

    • B. 

      False

  • 13. 
    F 2, generation is the offspring of the F 1 generation.
    • A. 

      True

    • B. 

      False

  • 14. 
    _____ are different versions of a gene.
    • A. 

      Alleles

    • B. 

      Phenotype

    • C. 

      Dominant

    • D. 

      Incomplete dominance

    • E. 

      Heredity

  • 15. 
    _____ is a factor (gene) that masks or covers another form of a trait.
    • A. 

      Dominant

    • B. 

      Recessive

    • C. 

      Allele condition

    • D. 

      Monohybrid Cross

    • E. 

      Self-Pollination

  • 16. 
    Calculate the ratio of pod color using 428 green pods and 152 yellow pods.
    • A. 

      2.84 : 1

    • B. 

      2.81 : 2

    • C. 

      3.01 : 1

    • D. 

      2.81 : 1

    • E. 

      3.14 : 1

  • 17. 
    Calculate the ratio of flower color using 705 purple flowers and 224 white flowers.
    • A. 

      2.84 : 1

    • B. 

      2.81 : 2

    • C. 

      3.01 : 1

    • D. 

      2.81 : 1

    • E. 

      3.15 : 1

  • 18. 
    What is the name of the diagram that predicts the outcomes of a genetic cross?
    • A. 

      Molecular Genetics

    • B. 

      Mendel's Square

    • C. 

      Punnett Square

    • D. 

      Genotypic Ratio Square

  • 19. 
    Please choose the correct homozygous genotype for Pisum sativum L.
    • A. 

      [TT]

    • B. 

      [Tt]

    • C. 

      [GGg]

    • D. 

      [PPpp]

  • 20. 
    _____, when the two alleles of a particular gene are the same.
    • A. 

      Genotype

    • B. 

      Phenotype

    • C. 

      Dominant

    • D. 

      Homozygous

    • E. 

      Heterozygous

    • F. 

      Recessive

  • 21. 
    _____, when the two alleles of a particular gene are the different.
    • A. 

      Genotype

    • B. 

      Phenotype

    • C. 

      Dominant

    • D. 

      Homozygous

    • E. 

      Heterozygous

    • F. 

      Recessive

  • 22. 
    Genotype is a set of alleles that an individual has for a selected characteristic.
    • A. 

      True

    • B. 

      False

  • 23. 
    _____ is the physical appearance of an organism.
    • A. 

      Genotype

    • B. 

      Phenotype

    • C. 

      Dominant

    • D. 

      Homozygous

    • E. 

      Heterozygous

    • F. 

      Recessive

  • 24. 
    A(n)_____ _____ is a cross that considered two pairs of contrasting traits.
    • A. 

      Monohybrid Cross

    • B. 

      Molecule Cross

    • C. 

      Genotypic Ratio Cross

    • D. 

      Dihybrid Cross

    • E. 

      Phenotypic Cross

  • 25. 
    _____ traits are not expressed when the dominant form of the trait is present.
    • A. 

      Genotype

    • B. 

      Recessive

    • C. 

      Phenotype

    • D. 

      Law of independent assortment

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