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5 Written questions

5 Matching questions

  1. Gā‚ Stage (presynthetic gap)
  2. Metaphase
  3. Stages of Mitosis
  4. Binary Fission
  5. Synapsis
  1. a - chromosomes align
  2. b - a simple form of asexual reproduction in prokaryotes
    - circular chromosome replicates
    - a new plasma membrane and cell wall grow inward along the midline of the cell, dividing it into two
    - each daughter cell contains a duplicate of the parent chromosome
  3. c homologous chromosomes come together and intertwine
  4. d - 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 Gā‚€
    - 2N number of chromosomes
  5. e PMAT:
    a) Prophase
    b) Metaphase
    c) Anaphase
    d) Telophase

5 Multiple choice questions

  1. - the first time a female gets her period
  2. - 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)
  3. - happened 12-24 hours after ovulation
    - occurs in the lateral, widest portion of the fallopian tube
    - sperm travels through vaginal canal, cervix, uterus, and into the fallopian tubes to reach the ovum
    - sperm penetrates corona radiata, then zona pellucida, contact with ovum cell membrane, become acrosomal process, fuse sperm with ovum
    - sperm nucleus enters ovum's cytoplasm and ovum completes meiosis II
  4. - women ovulate about once every four weeks
    - menapause occurs between age 45 and 50
    - during menopause, ovaries become less sensitive to the hormones that stimulate follicle development (FSH and LH), and eventually they atrophy
    - remaining follicles disappear, estrogen and progesterone levels greatly decline and ovulation stops
  5. where sperm acquire motility and stored here till ejaculation

5 True/False questions

  1. Follicles- multilayered sac of cells that contains, nourishes and protects and immature ovum
    - follicle cells produce estrogen

          

  2. Gonads- female gonads
    - found in the abdominal cavity
    - produce eggs (ova)
    - secrete esterogen and progesterone
    - consist of thousands of follicles

          

  3. Budding- lower, narrow end of the uterus
    - connects with the vaginal canal

          

  4. Metaphase I- homolgous pairs (tetrads) align at the equatorial plane
    - each pair attaches to a separate spindle fiber by its kinetochore

          

  5. Monozygotic (identical) Twins- result when a single zygote splits into two embryos
    - if splitting occurs at the two-cell stage of development, embryos will have separate chorions and separate placentas
    - if it occurs at blastula stage, embryos only have one chorionic sac and share a placenta (and probably amnion)