Unit 6 Target 1: Meiosis

19 Questions | Total Attempts: 930

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Unit 6 Target 1: Meiosis

Questions and Answers
  • 1. 
    During metaphase I of meiosis, which of the following occurs?
    • A. 

      Centromeres of replicated chromosomes line up along the cells equator.

    • B. 

      Sister chromatids separate and move toward opposite poles of the cell.

    • C. 

      Paired homologous chromosomes line up along the cells equator.

    • D. 

      Homologous chromosomes separate and move toward opposite poles.

  • 2. 
    Nondisjuction can occur during which of the following phases?
    • A. 

      Metaphase I only

    • B. 

      Anaphase I only

    • C. 

      Metaphase I and II only

    • D. 

      Anaphase I and II only

  • 3. 
    A trisomy of chromosome 21 causes what condition?
    • A. 

      Albinism

    • B. 

      Dwarfism

    • C. 

      Down syndrome

    • D. 

      Color blindness

  • 4. 
    Which one of the following is the cell process that allows parents to contribute genes to their offspring?
    • A. 

      Mitosis

    • B. 

      Meiosis

    • C. 

      Protein synthesis

    • D. 

      Diffusion

  • 5. 
    Which of the following is NOT true about how meiosis reduces the number of chromosomes?
    • A. 

      There are 2 divisions.

    • B. 

      Homologous chromosomes pair up during Prophase I.

    • C. 

      Anaphase I separates homologous chromosomes & Anaphase II separates sister chromatids.

    • D. 

      Interphase (DNA replication) occurs twice.

  • 6. 
    Meiosis results in the formation of
    • A. 

      Haploid body cells.

    • B. 

      Haploid sex cells.

    • C. 

      Diploid body cells.

    • D. 

      Diploid sex cells.

  • 7. 
    If an organism's diploid number is 12, its haploid number is
    • A. 

      12.

    • B. 

      24.

    • C. 

      3.

    • D. 

      6.

  • 8. 
    Gametes have what number of chromosomes relative to the parent cell?
    • A. 

      Two times.

    • B. 

      One-quarter

    • C. 

      The same

    • D. 

      One half

  • 9. 
    Which one of the following is TRUE about the production of gametes?
    • A. 

      Spermatogenesis results in 1 viable sperm cell and 3 polar bodies.

    • B. 

      Male animals undergo oogenesis before birth.

    • C. 

      Oogenesis results in 1 viable egg cell and 3 polar bodies.

    • D. 

      All of the above are true

  • 10. 
    Meiosis results in the formation of 
    • A. 

      Two geneticall different cells.

    • B. 

      Two genetically identical cells.

    • C. 

      Four genetically different cells.

    • D. 

      Four genetically identical cells.

  • 11. 
    Gametes are produced by the process of 
    • A. 

      Mitosis.

    • B. 

      Replication.

    • C. 

      Meiosis.

    • D. 

      Crossing-over

  • 12. 
    Gametes have
    • A. 

      Homologous chromosomes.

    • B. 

      Two sets of chromosomes.

    • C. 

      One allele for each gene.

    • D. 

      Two the number of chromosomes.

  • 13. 
    Why does crossing over occur during Meiosis but NOT during Mitosis?
    • A. 

      Chromatids are not involved in mitosis.

    • B. 

      Homologous chromosomes do not pair up during mitosis.

    • C. 

      A cell undergoing mitosis does not have homologous chromosomes.

    • D. 

      There is no prophase during mitosis.

  • 14. 
    A female gamete produced during meiosis is called _______.
    • A. 

      Sperm

    • B. 

      Spermatogonium

    • C. 

      Oogonium

    • D. 

      Ovum

  • 15. 
    How many chromosomes are found in human gametes?
    • A. 

      12

    • B. 

      23

    • C. 

      92

    • D. 

      46

  • 16. 
    During cytokinesis in the female, what divides unequally?
    • A. 

      The sperm cell

    • B. 

      The ovary

    • C. 

      The cytoplasm

    • D. 

      The DNA

  • 17. 
    What is shown in the diagram?
    • A. 

      Anaphase I

    • B. 

      Gametes

    • C. 

      Crossing-over

    • D. 

      Replication

  • 18. 
    When does the process in the diagram happen?
    • A. 

      Metaphase II

    • B. 

      Prophase II

    • C. 

      Prophase I

    • D. 

      Metaphase I

  • 19. 
    Refer to the illustration, The process shown is 
    • A. 

      Mitosis.

    • B. 

      Chromosomal mutation.

    • C. 

      Meiosis.

    • D. 

      Dominance.

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