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5 Written questions

5 Matching questions

  1. Homologous Chromosomes
  2. Tetrad
  3. Spermatogenesis Process
  4. Metaphase I
  5. Uterus
  1. a chromosome consisting of two sister chromatids
  2. b - site of fetal development
  3. c - homolgous pairs (tetrads) align at the equatorial plane
    - each pair attaches to a separate spindle fiber by its kinetochore
  4. d chromosomes that code for the same trait, one inherited from each parent
  5. e - spermatogonia (diploid) differentiate into primary spermatocytes (diploid)
    - primary spermatocytes undergo the first meiotic division and yield two secondary spermatocytes (haploid)
    - secondary spermatocytes undergo second meiotic division and yield four spermatids (haploid)
    - spermatogonia (2N) --> 1° spermatocytes (2N) --> meiosis I --> 2° spermatocytes (N) --> spermatids (N) --> spermatozoa (N)

5 Multiple choice questions

  1. - 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
  2. - mixed with sperm, aids in sperm transport by lubricating passageways
    - semen: sperm + seminal fluid
    - produced by:
    a) seminal vesicles: fructose-rich fluid, serves as energy source
    b) prostate gland: alkaline milky fluid to protect from acidic environment in female's reproductive tract
    c) bulbourethral glands: small amount of viscous fluid, function unknown
  3. - 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. - 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. - testes contain two functional components: seminiferous tubules and interstitial cells (cells of Leydig)
    - sperm are produced in seminiferous tubules, nourished by Sertoli cells
    - interstitial cells secrete testosterone and anderogens
    - testes have to be 2-4°C lower than body temperature

5 True/False questions

  1. Vulva- external female genitalia

          

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

          

  3. The Cell Cycle- four stages: G₁, S, G₂ and M
    - interphase: first three stages
    - mitosis includes the actual cell division

          

  4. Binary Fission- prokaryotes' way of of cell division
    - a type of asexual reproduction
    - splits into two equal halves, each daughter cell receives a complete copy of the original chromosome

          

  5. G₂ Stage (postsynthetic gap)- 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