GRADING RUBRIC Karyotyping Activity TOTAL POINTS = 43

GRADING RUBRIC Karyotyping Activity TOTAL POINTS = 43

GRADING RUBRIC Karyotyping Activity TOTAL POINTS = 43 points Site 1: www.biology.arizona.edu Click on Karyotyping under human biology and read the Introduction page: 1. What causes a dark band on the chromosome?

Giemsa dye 2 points 2. What is a centromere? areas where the two chromatids are joined 2 points

Patient A ( Click on the link to "Complete Patient A's Karyotype" ) *Match the chromosome to its homolog. After all the matches are complete you'll analyze your patient. (Scroll down to view your completed karyotype). 3. What is patient A's history (summarize) nearly full term fetus of a 40 year old female

2 points 4. How many total chromosomes are in your karyotype - count them 47 The last set of chromosomes is the sex chromosomes, if you have two large chromosomes, your patient is XX (female), one large and one small

indicates and XY (male) . What sex chromosomes does your patient have XX Which chromosome set has an extra + 21 3 points 5. What diagnosis would you give this patient (what disease)? Down Syndrome

2 points Patient B - click on the link to go to Patient B and repeat the above process. 6. What is Patient B's history (summarize) 28 year old male, infertile

2 points 7. How many total chromosomes are in your karyotype count them 47 What sex chromosomes does your patient have XXY Which chromosome set has an extra + X 3 points

8. Finish the notation for this patient's karyotype : 47 X XY 2 points 9. What is the diagnosis? Klinefelter's Syndrome 2 points

Patient C - click on the link to go to Patient C and repeat the above process. 10. What is patient C's history (summarize)? died shortly after birth 2 points

11. How many total chromosomes are in your karyotype count them 47 What sex chromosomes does your patient have XY Which chromosome set has an extra + 13 3 points 12. Write out the correct notation for this karyotype. 47 XY +13

2 points 13. What is the diagnosis? Trisomy 13 Syndrome 2 points Site 2: Genetic Science Learning Center (

http://learn.genetics.utah.edu/ ) Go to "heredity and traits" --> "How Do Scientists Read Chromosomes" (Find the answers to the following questions in this area. Browse all sections) 1. What are the three key features used to read chromosomes? size

banding pattern centromere position 3 points 2. Sketch or describe: metacentric, submetacentric, acrocentric metacentric - centromere is near the center

submetacentric - one arm is much shorter than the other acrocentric - centromere lies at one end 2 points 3. Got to Make a Karyotype - Try it yourself - Create your own karyotype - turning on hints is okay.

Check this box when your karyotype is complete What did you find difficult about matching the chromosomes? answers vary, chromsomes can be difficult to match 2 points 4. Go to - Using Karyotypes to Predict Genetic Disorders

What is trisomy? extra chromosome, individual has 3 instead of 2 for a group What is monosomy? missing chromosome, only one in a pair is present What is a terminal deletion? a chromosome is missing a piece, usually the tip 3 points

5. For each of the Disorders, describe the chromosome abnormality and the symptoms. Cri Du Chat -name of this syndrome is French for "cry of the cat," caused by a deletion of chromosome #5 Turner Syndrome - missing or incomplete X chromosome, girls with this disorder are shorter than normal, and may fail to start puberty when they

should. Klinefelter Syndrome - males who have Klinefelter syndrome have an extra X chromosome (XXY), males have less muscular body, and grow very little facial or body hair, also infertile Williams Syndrome - missing genetic material from chromosome 7, causes problems with the circulatory 4 points

system and heart defects. TOTAL POINTS = 43 points

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