1. Genetic Disorders Biology

2. Trisomy There are three chromosomes instead of two on an autosome. Humans can only survive with three chromosomes on numbers 13, 18, and 21.

3. Monosomy One member of a chromosomal pair is missing.

4. Down Syndrome Trisomy 21 – There are three chromosomes on number 21. Characteristics – Small Head – Slanted eyes – Infertility in males – Cognitive disabilities

5. Kleinfelter’s Syndrome Characteristics – Males are sterile – Some cognitive disabilities – Tall stature – XXY

6. Polydactyly People with this disorder have an extra finger or toe. – Small piece of extra tissue; often contains bones with no joints. 1 in every 500 births

7. Hairy Ears

8. X dominant sex linked trait.

9. Color Blindness A color vision deficiency Color blindness can be inherited genetically It is most common from mutations on the X chromosome.