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5 Written questions

5 Matching questions

  1. Somatic Cells
  2. Ovaries
  3. Spermatogenesis
  4. Anaphase II
  5. G₁ Stage (presynthetic gap)
  1. a - 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
  2. b - or called autosomal cells
    - everything but the gamete
    - contain diploid number of chromosomes characteristic of its species (2N)
    - N is the number of chromosomes found in haploid cell (gamete)
    - in human, 2N = 46 and N = 23
  3. c - "sperm production"
    - occurs in seminiferous tubules
    - after a male reaches sexual maturity, about 3 million primary spermatocytes begin spermatogenesis per day
    - maturation takes about 65-75 days
  4. d - female gonads
    - found in the abdominal cavity
    - produce eggs (ova)
    - secrete esterogen and progesterone
    - consist of thousands of follicles
  5. e - sister chromatids are pulled to opposite poles by the spindle fibers

5 Multiple choice questions

  1. - outer layer of the oocyte cell membrane
  2. - production of female gametes
    - occurs in the ovarian follicles
    - one primary oocyte completes meiosis I per month after menarche
    - yields two secondary oocyte and a polar body
    - secondary oocyte is expelled from the follicle during ovulation
    - meiosis II doesn't occur till fertilization
  3. - chromosomes line up along the equatorial plane
    - centromeres divide
    - chromosomes separate into pairs of sister chromatids
  4. - chromosomes condense
    - centriole pairs separate and move toward opposite poles of cell
    - spindle apparatus form
    - nuclear membrane dissolves
    - kinetochores, attached kinetochore fibers, appear at the chromosome centromere
  5. - 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)

5 True/False questions

  1. Synapsishomologous chromosomes come together and intertwine

          

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

          

  3. Metaphase- chromosomes align

          

  4. Binary Fission- a process by which an organism perpetuates itself and its species
    - divided into: cell division, asexual reproduction and sexual reproduction

          

  5. The Cell Cycle- multilayered sac of cells that contains, nourishes and protects and immature ovum
    - follicle cells produce estrogen