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5 Written questions

5 Matching questions

  1. Budding
  2. Gonads
  3. Pathway of Sperm
  4. Vulva
  5. Spermatogenesis Process
  1. a SEVEN UP:
    Seminiferous tubules
    Epididymus
    Vas deferens
    Ejaculatory duct
    (Nothing)
    Urethra
    Penis
  2. b - replication of the nucleus followed by unequal cytokinesis
    - the cell membrane pinches inward to form a new cell that is smaller in size but genetically identical to the parent cell
    - can grow to an adult size
    - new cell may separate immediately from the parent or remain attached to it
    - occurs in hydra and yeast
  3. c - 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)
  4. d - external female genitalia
  5. e - male: testes
    - female: ovaries

5 Multiple choice questions

  1. - four stages: G₁, S, G₂ and M
    - interphase: first three stages
    - mitosis includes the actual cell division
  2. - fusion of two gametes (specialized sex cells produced by each parent)
    - meiosis is the process where the sex cells are produced
    - mitosis preserves the diploid chromosome number while meiosis halves it
    - somatic cells undergo mitosis, gametocytes undergo meiosis
    - during fertilization, two haploid gametes fuse, restoring the diploid number
  3. - chromosomes line up along the equatorial plane
    - centromeres divide
    - chromosomes separate into pairs of sister chromatids
  4. - nuclear membrane forms around each new haploid nucleus
    - two daughter cells are formed after cytokinesis
    - by completion of meiosis II, four haploid daughter cells are produced per gametocyte
  5. - 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

5 True/False questions

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

          

  2. Male Reproductive Anatomy- 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

          

  3. Primary Oocyte- 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

          

  4. Telophase- spindle apparatus disappears
    - new nuclear membrane forms around each set of chromosomes
    - nucleoli reappears
    - chromosomes uncoil
    - cytokinesis occurs

          

  5. Spermatogenesis- spermatids after a series of changes, becomes a mature sperm
    - mature sperm is an elongated cell with a head, neck, body and tail
    - head consists almost entirely of the nucleus
    - tail (flagellum) propels the sperm
    - mitochondria in the neck and body provide energy for locomotion

          

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