Genetics: Cells And Chromosomes! Trivia Quiz

25 Questions | Total Attempts: 96

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Genetics Quizzes & Trivia

Our body is made up of millions of cells, and each cell has chromosomes within it. Different chromosomes perform different tasks, and it is important to ensure that you know these chromosomes and how they form a person’s DNA. Think that you know a lot? Well, take up this test on cells and chromosomes to see just how much you know. All the best!


Questions and Answers
  • 1. 
    What are homologus chromosomes?
    • A. 

      They are gametes that are formed by the same parent.

    • B. 

      Chromosomes that code for the same traits.

    • C. 

      Genetic material that needs to be copied before meiosis can begin.

  • 2. 
    At the end of Meiosis 1 there are two daughter cells.
    • A. 

      True

    • B. 

      False

  • 3. 
    At the end of Meiosis 1 the daughter cells have half as many chromosomes as the parent cell.
    • A. 

      True

    • B. 

      False

  • 4. 
    Meiosis has two phases. Both of which contain a phase where crossing over occurs.
    • A. 

      True

    • B. 

      False

  • 5. 
    Human cells have 46 chromosomes.
    • A. 

      True

    • B. 

      False

  • 6. 
    If a fruit fly has 8 chromosomes in its body cells. The gametes would have ___ chromosomes.
    • A. 

      16

    • B. 

      8

    • C. 

      4

  • 7. 
    Check all that apply: A sperm cell is...
    • A. 

      A reproductive cell in females

    • B. 

      A reproductive cell in males

    • C. 

      A zygote

    • D. 

      Haploid

  • 8. 
    A gamete is
    • A. 

      The first phase in interphase

    • B. 

      A cellular organelle

    • C. 

      A reproductive cell

  • 9. 
    Crossing over is important because it provides a method of genetic variation. In other words, it is a way to ensure that gametes have some genetic differences from their parent cells.
    • A. 

      True

    • B. 

      False

  • 10. 
    The definition of haploid is
    • A. 

      A condition of having twice as many chromosomes

    • B. 

      A condition of having half as many chromosomes

    • C. 

      A condition of being sick

  • 11. 
    Metaphase in Meiosis 1 and Metaphase in Meiosis 2 are different because
    • A. 

      The chromosomes that are lining up in the middle of the cell in Meiosis 1 are homologus pairs.

    • B. 

      During metaphase in Meiosis 1, the chromosomes are already splitting away from each other.

    • C. 

      During meiosis 1 the nuclear membrane is still intact.

  • 12. 
    A purebred pea plant for height is crossed with a hybrid for height. The phenotypic ratio is 4:0.
    • A. 

      True

    • B. 

      False

  • 13. 
    Check all the possible combinations of alelles in this pea plant's pollen:    TtPp
    • A. 

      TP

    • B. 

      Tp

    • C. 

      TT

    • D. 

      Tp

    • E. 

      TP

    • F. 

      PP

  • 14. 
    A homozygous recessive plant has two copies of the ____________________ allele.
  • 15. 
    The ___________________ of the organism is what you can see.
  • 16. 
    The __________________________ of the organism is what is in the genes.
  • 17. 
    Perform the following cross and check the boxes for the correct phenotypic and genotypic ratios.
    • a heterozygous green seeded plant crossed with a purebred recessive for seed color
    • A. 

      Phenotypic ratio 2:2

    • B. 

      Genotypic ratio 2:2

    • C. 

      Phenotypic ratio 1:3

    • D. 

      Genotypic ratio 1:3

    • E. 

      Phenotypic ratio 1:2:1

    • F. 

      Genotypic ratio 1:2:1

  • 18. 
    When a purebred recessive plant is crossed with a plant with the dominant phenotype you can find out if the second plant is a hybrid or a purebred by looking at the possible offspring. Choose the correct allele combinations of the offspring if the unknown plant's genotype is homozygous dominant.
    • A. 

      All four of the offspring will have the dominant phenotype

    • B. 

      One will have the dominant phenotype and three will have the recessive

    • C. 

      Two will show the dominant phenotype and two the recessive

    • D. 

      One will have the recessive phenotype and three the dominant

  • 19. 
    What principle states that during gamete formation genes for different traits separate without influencing each other's inheritance?
    • A. 

      Principle of dominance

    • B. 

      Principle of independent assortment

    • C. 

      Principle of probabilities

    • D. 

      Principle of segregation

  • 20. 
    If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many different phenotypes are their offspring expected to show?
    • A. 

      2

    • B. 

      4

    • C. 

      8

    • D. 

      16

  • 21. 
    Situations in which one allele for a gene is not completely dominant over another allele for that gene are called
    • A. 

      Multiple alleles.

    • B. 

      Polygenic inheritance.

    • C. 

      Incomplete dominance.

    • D. 

      Multiple genes.

  • 22. 
    A cross of a red cow (RR) with a white bull (WW) produces all roan offspring (RW).  This type of inheritance is known as
    • A. 

      Incomplete dominance.

    • B. 

      Polygenic inheritance.

    • C. 

      Multiple alleles

    • D. 

      Codominance.

  • 23. 
    Variation in human skin color is a result of polygenic traits. 
    • A. 

      True

    • B. 

      False

  • 24. 
    If an organism's diploid number is 12, its haploid number is
    • A. 

      12

    • B. 

      6

    • C. 

      24

    • D. 

      3

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