1. Karyotypes
Essential Question: How are Karyotypes used to study chromosomal disorders?

2. What is a Karyotype?
-A karyotype is a picture of all the chromosomes from an individual's cells.
-A karyotype is a test used to check for chromosome abnormalities.

3. If there are chromosomal number abnormalities, how do they form?
They often result from nondisjunction , the failure of chromosomes to separate properly during Meiosis (the process of creating sperm or egg cells)
-If there is a mistake when chromosomes are separating, then the resulting sperm or egg will have too many or too few chromosomes.

5. Fig. 2.9 ©Scion Publishing Ltd
What does a normal female karyotype look like?
Fig. 2.9 ©Scion Publishing Ltd

6. Fig. 2.9 ©Scion Publishing Ltd
What does a normal female karyotype look like?
46, XX
Fig. 2.9 ©Scion Publishing Ltd

7. 47,XX,+21

8. 47,XX,+13

9. 47,XX,+18

10. 47,XXY