Bio Study Guide 2

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Author:
HeidiBoehm
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177947
Filename:
Bio Study Guide 2
Updated:
2012-10-16 10:28:01
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BioStudy Guide Unit 2
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  1. Purpose of Mitosis:
    growth, repair, replacement, and asexual reproduction
  2. How does cytokinesis differ between animal and plant cells?
    cleavage furrow in animal cells ; cell plate in plant cells
  3. When does replication occur? 
    during S stage of interphase
  4. What is the method used by bacteria to produce more cells? 
    binary fission
  5. What is the difference between a benign and malignant tumor?
    Benign = one location ; malignant = spreading
  6. During which phase of mitiosis do the chromosomes line up in the middle?
    metaphase
  7. What is the purpose of meisosis? 
    to produce haploid gametes
  8. If an organism has a diploid number of 18, how many chromosomes will be in one of its liver cells? 
    18
  9. If an organism has a diploid number of 18, how many chromosomes will be in a gamete? 
  10. How many chromosomes does a person with trisomy 21 have in a somatic cell?
    47
  11. In humans, how many sex chromosomes are in a gamete?
    1
  12. What is a zygote?
    a fertilized egg
  13. Why does a seed need to have endosperm? 
    Stores food for developing embryo
  14. What is the purpose/function of the flower?
    sexual reproduction
  15. What is the correct order for the following from when the flower blooms? 
    pollination, fertilization, seed dispersal, germination
  16. For every cell that begins spermatogenesis, how many sperm are formed?
    4
  17. A fertilized eff is called a 
    zygote. 
  18. When you eat a fruit you are eating a 
    ripened ovary
  19. Genetic variation is due to what three things?
    Random fertilization, crossing over, independent assortment
  20. Where does oogenesis take place?
    ovary 
  21. What is non-disjuntion?
    when chromosomes do not separate correctly during meiosis resulting in some gametes that have too many chromosomes and gametes with too few. 
  22. What is another term for body cells?
    Somatic cells
  23. How many chromosomes are in a gamete?
    The haploid number
  24. How many autosomes in a human sperm?
    22
  25. When cancer spreads we say it has 
    metastasized
  26. What is the function of the polar bodies? 
    Have a place for the chromosomes to go during the formation of a haploid egg.
  27. How many sex chromosomes in a human sperm?
    1

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