Name:
14.1C
Date:
Period:
Karyotype Intro
Go to the following web address to answer questions on karyotypes.
http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html
1. Where do the images in this activity come from? ______________________________________
2. What phase of cell cycle is used for karyotypes? _______________________________________
3. Why do these chromosomes have dark bands across them? _____________________________
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4. What are the 3 identifying features of a chromosome? _____________________
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Click “Patient Histories” towards the bottom of the webpage.
“Complete Patient A’s Karyotype” to answer the questions .
5. Using the method explained under “Interpreting the karyotype,”
What notation would you use to characterize Patient A’s karyotype? _____________________
6. What diagnosis would you give to this patient (questions A2)? ___________________________
7. Is Patient A male or female? How can you tell? _______________________________________
______________________________________________________________________________
Click “Patient B” towards the bottom of the webpage.
Complete the karyotype and then answer the following questions.
8. Using the method explained under “Interpreting the karyotype,”
What notation would you use to characterize Patient B’s karyotype? _____________________
9. What diagnosis would you give to this patient (questions B2)? ___________________________
10. Is Patient B male or female? How can you tell? _______________________________________
______________________________________________________________________________
Click “Patient C” towards the bottom of the webpage.
Complete the karyotype and then answer the following questions.
11. Using the method explained under “Interpreting the karyotype,”
What notation would you use to characterize Patient C’s karyotype?
_____________________
12. What diagnosis would you give to this patient (questions C2)? ___________________________
13. Is Patient C male or female? How can you tell? _______________________________________
______________________________________________________________________________
14. What 2 important pieces of information are gathered from karyotypes? ___________________
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Now go to the following web address to answer the questions on the
Y chromosome. http://www.pbs.org/wgbh/nova/israel/familyy.html
15. What is the second reason the website lists the Y chromosome as unique? _________________
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16. Explain the answer to #15 by answering: Why can’t the Y chromosome exchange DNA during
meiosis? ______________________________________________________________________
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17. What makes a genetic record of the male line? _______________________________________
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18. List 3 things the Y chromosome allows to do. (last paragraph)
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