BIOL 207 - 3

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Author:
ebacker
ID:
173008
Filename:
BIOL 207 - 3
Updated:
2012-09-24 14:48:37
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BIOL 207
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Description:
Lecture 3 - Human Chromosomes
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  1. What properties determine the name of a chromsome?
    • Occurence
    • Length
    • Location of Centromere
  2. What are the 2 types of occurences in human chromosomes?
    • Present in 2 copies = Autosomes
    • Not present in 2 copies (singular) = sex chr.
  3. What are the 3 positions and names of centromere locations?
    • Middle = metacentric
    • Towards one end = acrocentric
    • At one end = telocentric
  4. Which centromere location do humans lack?
    Telocentric
  5. What is the difference between karyogram and karyotype?
    • Karyogram = image
    • Karyotype = description
  6. What is the proper way to name a chromosome?
    total # of chr, sex chr, abnormalities

    ex. normal human female: 46, XX
  7. When referring to chr bands, what does 5p15 mean?
    • chr 5
    • p-arm
    • region 1
    • band 5
  8. What are the parts of a chr?
    • p - short arm
    • q - long arm
    • cen - centromere
    • ter - terminus
    • pter - end of short arm
    • qter - end of long arm
  9. What symbols are used for chr number abnormalities?
    • + extra copy of ____
    • - absence of ___
  10. What are the chr rearrangements?
    • del - deletion
    • dup - duplication
    • inv - inversion
    • t - translocation
  11. What does 46, XX, del(5)(p15pter) means?
    • 46 chr
    • Female
    • Deletion on chr 5 on the p-arm from region 1, band 5 to the end of the p-arm

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