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5 Written questions

5 Matching questions

  1. Chiasmata
  2. Metaphase II
  3. Parthenogenesis
  4. Ovulation and Menopause
  5. Somatic Cells
  1. a - chromosomes line up along the equatorial plane
    - centromeres divide
    - chromosomes separate into pairs of sister chromatids
  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 where chromosomes are joined
  4. d - 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
  5. e - 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 Multiple choice questions

  1. - inner layer of the oocyte cell membrane
  2. - 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
  3. - sister chromatids are pulled to opposite poles by the spindle fibers
  4. - essentially genetic carbon copies of parent cells
    - identical to parent cells except for random mutations
    - different types: binary fission, budding, regeneration, parthenogenesis
  5. - a process by which an organism perpetuates itself and its species
    - divided into: cell division, asexual reproduction and sexual reproduction

5 True/False questions

  1. M Stage (Mitosis)- each chromosome is replicated so that during division, a complete copy can be distributed to each daughter cell
    - two identical sister chromatids held together at a region called the "centromere"
    - telomeres: ends of the chromosomes
    - 2 x 2N number of chromosomes

          

  2. Pathway of Sperm- 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

          

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

          

  4. Acrosome- sister chromatids separate
    - telomeres are the last part of the chromatids to separate

          

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

          

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