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5 Written questions

5 Matching questions

  1. Monozygotic (identical) Twins
  2. Binary Fission
  3. Prophase
  4. Female Reproductive Anatomy
  5. G₁ Stage (presynthetic gap)
  1. a - 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)
  2. b - 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
  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 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
  5. e - 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 Multiple choice questions

  1. - results when two ova are released in one ovarian cycle
    - fertilized by two different sperm
    - two embryos implant in the uterine wall individually
    - each develops its own placenta, amnion and chorion
    - share characteristics in the level of siblings
  2. - site of sperm deposition during intercourse
    - passageway through which a baby is expelled during childbirth
  3. - only occurs in the sex cells
    - meiosis I produces two intermediate daughter cells
    - meiosis II is similar to mitosis, it separates sister chromatids and results in four genetically distinct haploid gametes
  4. - 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
  5. - mitosis: division and distribution of the cell's DNA to its two daughter cells such that each cell receives a complete copy of the original genome
    - cytokinesis: division of cytoplasm that follows
    - happens on somatic cells only
    - 2N --> 2N (ends up with two diploid cells)

5 True/False questions

  1. Telophase I- a nuclear membrane forms around each new nucleus
    - each chromosomes still consists of sister chromatids joined at the centromere
    - cells divide into two daughter cells
    - between cell divisions, there might be "interkinesis", a short rest period where chromosomes partically uncoil


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


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


  4. Homologous Chromosomeschromosomes that code for the same trait, one inherited from each parent


  5. Chiasmata- granular DNA during interphase