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5 Written questions

5 Matching questions

  1. Cortical Reaction
  2. Gonads
  3. G₁ Stage (presynthetic gap)
  4. Metaphase II
  5. Cell Division
  1. a - triggered by acrosomal reaction
    - calcium ions released into the cytoplasm, initates a series of reaction to form the fertilization membrane
    - calcium ion also stimulates increase in ovum's metabolic rate
    - this is followed by fusion of the sperm nucleus with ovum nucleus to form a diploid zygote
  2. b - male: testes
    - female: ovaries
  3. c - intense biochemical activity and growth
    - cell doubles in size and new organelles are produced
    - passing "restriction point", where a cell is committed to continue through the rest of the cell cycle and divide
    - some cells like skeletal muscle cells and nerve cells never pass this point, and enter a nondividng phase sometimes referred to as G₀
    - 2N number of chromosomes
  4. d - a process where a cell doubles its organelles and cytoplasm, replicates its DNA and then divides in two
    - unicellular organism: reproduction
    - multicellular organism: growth, development & replace old cells
  5. e - chromosomes line up along the equatorial plane
    - centromeres divide
    - chromosomes separate into pairs of sister chromatids

5 Multiple choice questions

  1. - similar to mitosis
    - not preceded by chromosomal replication
  2. - granular DNA during interphase
  3. - once a month, an immature ovum is released from the ovary into the abdominal cavity and drawn into the nearby fallopian tube
    - inner surface of the fallopian tube is lined with cilia that move the ovum into and along the tube and toward the uterus
    - mammalian female's reproductive and excretory systems are distinct from one another (urethra and vagina aren't connected)
  4. - happens at the end of telophase
    - cytoplasm divides into two daughter cells
    - in animal cells, a cleavage furrow forms, cell membrane indents along the equator of the cell and cell split
  5. - cap-like structure, over the anterior half of mature sperm's head
    - derived from Golgi apparatus
    - contains enzymes to penetrate the tough outer covering of the ovum
    - once in contact with ovum cell membrane, sperm forms a tubelike structure called the acrosomal process
    - acrosomal process extends and fuses with ovum and enters the ovum's cytoplasm

5 True/False questions

  1. Ovulation and Menopause- site of sperm deposition during intercourse
    - passageway through which a baby is expelled during childbirth

          

  2. Ovaries- site of fetal development

          

  3. Parthenogenesis- development of an unfertilized egg into an adult organism
    - occurs naturally in certain lower organisms (bees and ants, some salamander)
    - eggs of some organisms can be induced to develop parthenogenetically (not done naturally)
    - since the organism develops from a haploid cell, all of its cells will be haploid

          

  4. G₂ Stage (postsynthetic gap)PMAT:
    a) Prophase
    b) Metaphase
    c) Anaphase
    d) Telophase

          

  5. Pathway of Sperm- immature ova
    - diploid cells that form by mitosis in the ovary
    - at birth, all of the primary oocyte that a female will produce during her lifetime are already in her ovaries