How Much You Know About Genetic Variation? Trivia Quiz

20 Questions | Total Attempts: 21

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How Much You Know About Genetic Variation? Trivia Quiz

How much you know about genetic variation? It is not uncommon for genes to be different from one person to another, and the three major causes for these variations are mutation, gene flow, and sexual reproduction. In this quiz, you will get to test out how well you understand genes and the causes for the variations as well. Give it a shot!


Questions and Answers
  • 1. 
    A picture of a person's chromosomes is called a(n):
    • A. 

      Syndrome

    • B. 

      Karyotype

    • C. 

      Chromatin

    • D. 

      Finger Print

  • 2. 
    Genetics is the branch of biology that involves the study of how different traits are transmitted from one generation to the next.
    • A. 

      True

    • B. 

      False

  • 3. 
    A probability of 1/4 is equal to a probability of 75 percent.
    • A. 

      True

    • B. 

      False

  • 4. 
    What is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype?
    • A. 

      25%

    • B. 

      50%

    • C. 

      66%

    • D. 

      100%

  • 5. 
    Mendel's law of segregation explains 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 ends up in a different gamete.

    • D. 

      Each gene is found on a different molecule of DNA.

  • 6. 
    If an individual has two recessive alleles for the same trait, the individual is said to be
    • A. 

      Homozygous for that trait

    • B. 

      Haploid for that trait

    • C. 

      Heterozygous for that trait

    • D. 

      Mutated for that trait

  • 7. 
    An individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce many offspring. These offspring are likely to be
    • A. 

      All the same genotype.

    • B. 

      Of two different phenotypes.

    • C. 

      Of three different phenotypes.

    • D. 

      All the same phenotype.

  • 8. 
    Tallness (T) is dominant over shortness (t) in pea plants. Which of the following represents the genotype of a pea plant that is heterozygous for tallness?
    • A. 

      T

    • B. 

      TT

    • C. 

      Tt

    • D. 

      Tt

  • 9. 
    In humans, having freckles (F) is dominant over not having freckles (f). The inheritance of these traits can be studied using a Punnett square similar to the one provided. Refer to the illustration provided. The genotype represented in box 1 in the Punnett square would:
    • A. 

      Have an extra freckles chromosome.

    • B. 

      Be heterozygous for freckles.

    • C. 

      Be homozygous for freckles.

    • D. 

      Have freckles chromosomes.

  • 10. 
    The difference between a monohybrid cross and a dihybrid cross is that
    • A. 

      Monohybrid crosses involve traits for which only one allele exists, while dihybrid traits involve two alleles.

    • B. 

      Monohybrid crosses involve self-pollination, while dihybrid crosses involve cross-pollination.

    • C. 

      Monohybrid crosses involve one trait; dihybrid crosses involve two traits.

    • D. 

      Dihybrid crosses require two Punnett squares; monohybrid crosses need only one.

  • 11. 
    Which of the following processes allows for cells to divide to produce new cells that contain all of the necessary information to survive?
    • A. 

      Cellular Reproduction

    • B. 

      DNA Replication

    • C. 

      MRNA translation

    • D. 

      DNA transcription

  • 12. 
    In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?
    • A. 

      0 BB: 2 Bb: 2 bb

    • B. 

      1 BB: 2 Bb: 1 bb

    • C. 

      2 BB: 0 Bb: 2 bb

    • D. 

      2 BB: 1 Bb: 0 bb

  • 13. 
    If several pea plants with the genotype TTYy are crossed with pea plants with the genotype Ttyy, what percentage of the offspring will be expected to have the T TYy allele combination?
  • 14. 
    In the 1860s Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid crosses involve the study of the inheritance patterns related to two different traits. In guinea pigs the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur (F) is dominant over the allele for long fur (f). What percentage of the offspring from a BbFf x bbff cross would be expected to be heterozygous for both traits?
  • 15. 
    Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what is the expected outcome of crossing two tomato plants that are heterozygous for hairy stems?
    • A. 

      75% hairy stems: 25% hairless stems

    • B. 

      100% hairy stems

    • C. 

      100% hairless stems

    • D. 

      50% hairy stems: 50% hairless stems

  • 16. 
    Sexual reproduction in animals depends on the production of gametes.  Choose all the processes below that produce gametes in animals?
    • A. 

      Mitosis

    • B. 

      Fertilization

    • C. 

      Meiosis

    • D. 

      Protein synthesis

  • 17. 
    Facial dimples are free earlobes are both considered dominant human traits.  What are the expected phenotypes of the offspring of a female with dimples and free earlobes (DDFf) and a male with no dimples and attached earlobes (ddff)? 
    • A. 

      50% dimples and free earlobes to 50% dimples and attached earlobes

    • B. 

      50% dimples and free earlobes to 50% no dimples and attached earlobes

    • C. 

      75% dimples and free earlobes to 25% no dimples and attached earlobes

    • D. 

      75% dimples and attached earlobes to 50% no dimples and free earlobes

  • 18. 
    Normal fruit flies have brownish-yellow bodies, and this body color is dominant.  A mutation in the gene for body color can produce flies with an ebony body color.  A homozygous normal fruit fly (e+ e+) is crossed with a homozygous ebony fruit fly (ee).  What is the predicted outcome of this genetic cross?
    • A. 

      All offspring will have ebony bodies

    • B. 

      Of the offspring, 75% will have brownish-yellow bodies, and 25% will have ebony bodies.

    • C. 

      All offspring will have brownish-yellow bodies.

    • D. 

      Of the offspring, 75% will have ebony bodies, and 25% will have brownish-yellow bodies.

  • 19. 
    Human body cells have 46 chromosomes in their nuclei.  Meiosis is necessary tin order to ensure that each gamete produced in the human body has _____  chromosomes.
  • 20. 
    Chickens can have different types of feathers.  Frizzled feathers curl toward a chicken's head.  Assume that feather type is determined by a single gene and the the allele for frizzled feathers is dominant over the allele for straight feathers.  In a cross between two chickens with straight feathers, what percentage of the offspring can be expected to have frizzled feathers?