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5 Written Questions

5 Matching Questions

  1. Corona Radiata
  2. Telophase I
  3. Binary Fission
  4. Cervix
  5. Acrosome
  1. a - 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. b - outer layer of the oocyte cell membrane
  3. c - lower, narrow end of the uterus
    - connects with the vaginal canal
  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 - cap-like structure, over the anterior half of mature sperm's head
    - derived from Golgi apparatus
    - contains enzymes to penetrate the tough outer covering of the ovum
    - once in contact with ovum cell membrane, sperm forms a tubelike structure called the acrosomal process
    - acrosomal process extends and fuses with ovum and enters the ovum's cytoplasm

5 Multiple Choice Questions

  1. homologous chromosomes come together and intertwine
  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. where chromosomes are joined
  4. - homologous chromosomes come together and intertwine
    - at this stage, chromosome consists of two sister chromatids
    - where recombination and crossing over happens, responsible for increased genetic diversity
  5. - 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

5 True/False Questions

  1. Oogenesis- 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

          

  2. Ovulation and Menopause- 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

          

  3. Asexual Reproduction- essentially genetic carbon copies of parent cells
    - identical to parent cells except for random mutations
    - different types: binary fission, budding, regeneration, parthenogenesis

          

  4. Homologous Chromosomes- cap-like structure, over the anterior half of mature sperm's head
    - derived from Golgi apparatus
    - contains enzymes to penetrate the tough outer covering of the ovum
    - once in contact with ovum cell membrane, sperm forms a tubelike structure called the acrosomal process
    - acrosomal process extends and fuses with ovum and enters the ovum's cytoplasm

          

  5. Anaphase I- disjunction: homologous pairs separate and are pulled to opposite poles of the cell
    - distribution of homologous chromosomes to intermediate daughter cells are random

          

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