Practice Quiz - Prefertilization Events
  1. Which of the following types of germ cells does not undergo cell division?
    spermatogonia
    primary oocytes
    spermatids
    secondary oocytes
    oogonia
  2. Oogonia are homologous to spermatogonia. Oogonia divide by mitosis during:
    all postnatal periods
    fetal life
    postnatal periods after puberty
    the reproductive period
    none of the above
  3. Prior to ejaculation, sperm are stored in the:
    seminal vesicles
    efferent ductules
    epididymis
    ejaculatory ducts
    seminal colliculus
  4. How many sperms, approximately, are deposited in the vagina during intercourse?
    300 thousand
    3 million
    30 million
    300 million
    3 billion
  5. The first meiotic division of the primary oocytes is characterized by:
    pairing of homologous chromosomes
    DNA replication
    crossing over
    production of a polar body
    all of the above
  6. The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the:
    capacitor
    head
    corona
    acrosome
    cumulus
  7. The ovulated mammalian oocyte is arrested at:
    prophase of meiosis I
    metaphase of meiosis I
    prophase of meiosis II
    metaphase of meiosis II
    none of the above
  8. The second meiotic division differs from the first meiotic division in that:
    crossing over only occurs during meiosis I
    there is pairing of the homologous chromosome during meiosis I
    there is no DNA synthesis during meiosis II
    all of the above
    none of the above
  9. The zona pellucida:
    is synthesized by the oocyte during oogenesis
    contains species-specific sperm receptor molecules
    is modified post-fertilization to block polyspermy
    all of the above
    none of the above
  10. Nondisjunction is the result of an abnormal meiotic division that:
    is thought to occur during oogenesis
    can result in autosomal trisomy
    can result in an individual with 47 chromosomes
    can be the result of homologous chromosomes failing to separate
    all of the above are correct
  11. During gametogenesis, meiosis occurs which reduces the chromosome number from _______ to _______.
    diploid to haploid
    haploid to tetraploid
    dizygotic to monozygotic
    bicornate to unicornate
    azygos to hemiazygos
  12. The human male has how many different chromosomes?
    48
    46
    47
    24
    26
  13. As the follicle grows, the oogonium becomes located in a mound of follicle cells called the:
    vesicular antrum
    oocyte
    cumulus oophorus
    liquor folliculi
    none of these
  14. How many different kinds of chromosomes are there in a human female?
    22
    23
    24
    25
    47
  15. The secondary oocyte completes the second maturation division:
    before ovulation
    during ovulation
    at fertilization
    before birth
    before puberty
  16. Spermatogonia, derived from primordial germ cells, divide by mitosis during:
    postnatal periods
    prenatal periods
    postnatal periods after puberty
    the reproductive period
    puberty
  17. The process of spermiogenesis involves, along with other events, the addition of a cap containing proteolytic enzymes to the head of the male sex cell. Immediately prior to spermiogenesis, the male sex cells are called _______________.
    spermatids
    primary oocytes
    secondary oocytes
    epididymis
    acrosomes
    spermatogonia
    oogonia
    cumulus oophorus
    spermatozoa
    polar bodies
  18. Immediately prior to ovulation, the first meiotic division, which had been arrested in prophase I, resumes. This transforms the developing sex cells into __________________, which becomes arrested again at the second metaphase of meiosis.
    spermatids
    primary oocytes
    secondary oocytes
    epididymis
    acrosomes
    spermatogonia
    oogonia
    cumulus oophorus
    spermatozoa
    polar bodies
  19. Which meiosis phase (I or II) does replication of DNA/crossing-over and centromere division of chromosomes occur respectively?
    Meiosis II / meiosis I
    Meiosis I / meiosis II
    Meiosis I / meiosis I
    Meiosis II / meiosis II
  20. A 4-year-old healthy female presents to your office to establish primary care. What phase of meiosis should her oocytes be in?
    Meiosis I - prophase
    Meiosis II - prophase
    Meiosis I - metaphase
    Meiosis II - metaphase
  21. A 24 year-old healthy female presents for her pap smear. She has regular periods that last 5-7 days and occur every 30 days. She denies abnormal pain, bleeding, discharge, or history of positive pap smears. What phase of meiosis should her selected oocyte be in?
    Meiosis I - prophase
    Meiosis II - prophase
    Meiosis I - metaphase
    Meiosis II - metaphase
  22. A 3 year-old male patient presents with epicanthal folds, flat nasal bridge, single palmar crease. The patient is 47 XY on karyotype. What could be the cause of this karyotype?
    Chromosomal mutation
    Chromosomal inversion
    Chromosomal nondisjunction
    Chromosomal deletion