botany ch5

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botany ch5
2011-11-14 22:12:28
botany ch5

botany ch5
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  1. sepals
    outermost whorl, leafy structures cover the bud
  2. petals
    brightly colored, attract pollinators
  3. androecium
    male structures, anther + filament
  4. dicot
    • parts in 4 or 5s
    • two cotyledons
    • netted venation
    • tap roots
    • 3 pores in pollen
  5. monocots
    • parts in 3s or 6s
    • one cotyledon
    • parallel venation
    • one more in pollen grain
    • fibrous roots
    • tepals- sepals that are colorfull and look like pedals
  6. complete flower
    contains all 4 floral whorls
  7. incomplete flower
    missing of the 4 whorls
  8. 4 floral whorls
    pistil, stamen, petal, sepal
  9. perfect flower
    flower w/ male and female parts
  10. imperfect flower
    either male or femal parts only
  11. hypogynous
    superiour ovary
  12. perigynous
    half inferior ovary
  13. epigynous
    inferior ovary
  14. diploid
    having a full set of chromosomes ( 1 from mom 1 from dad) in each cell
  15. haploid
    having only half the number of chromosomes present in each cell
  16. phyte
  17. gametophyte
    gamete producing plant
  18. sporophyte
    spore producing plant
  19. gamets are haploid (sperm, egg)
  20. results of meosis
    • haploid spores produced
    • sex cells
    • increase in genetic diversity
  21. dad-stamens
  22. meiosis reduces chromosome number from diploid to haploid
    • gentic material reduced to half
    • gametes produced with only one haploid set of chromosomes
  23. crossing over
    genetic exchange between each homologous pair of chromosoms
  24. meiosis
    specialized cell division results in formation of haploid cells (gametes)
  25. 2 major stages of meiosis
    • meiosis 1- crossing over occurs
    • meosis 2- cell division w/out replication
  26. interphase
    before meiosis begins, genetic material is duplicated
  27. prophase 1
    • duplicated chromatin condenses.
    • each chromosome consists of two, closely associated sister chromatids.
    • crossing over can occur during the latter part of this stage
  28. metaphase 1
    homologous chromosomes align at the equatorial plate
  29. anaphase 1
    homologous pairs seperate with sister chromatids remaining together
  30. telophase 1
    2 daughter cells are formed with each daughter containing only one chromosome of the homologous pair
  31. second division of meosis
    gamete formation
  32. prophase 2
    dna does not replicate
  33. metaphase 2
    chromosome align at the equatorial plate
  34. anaphase 2
    centromeres divide and sister chromatids migrate seperately to each pole
  35. telophase 2
    cell division is complete four haploid daughter cells are obtained
  36. microsporocytes (diploid)
    undergo meiosis 1 and 2 to make haploid microspores
  37. pollination
    the transfer of pollen from the anther to the stigma
  38. self pollination
    pollen transfer in same plant
  39. self complatible
    flowers make seeds by using their own pollen
  40. cross pollination
    pollen transfer from one plant to another
  41. self incompatible
    flowers cannot make seed w/out recieving genetically distinct pollen