HEREDITY

1. HEREDITY • Genotype: The genetic makeup of an organism. • Phenotype: Observable genetic traits. • Dominant: A genetic trait that is expressed with the presence of only one gene. • Recessive: A genetic trait that is expressed only with the presence of both genes.

2. PUNNET SQUARE A=Dominant B=Recessive A b A AA Ab b Ab bb

3. EARLOBES Dominant Recessive D_ dd

4. ROLLED TONGUE Dominant Recessive D_ dd

5. WIDOW’S PEAK Dominant Recessive D_ dd

6. FRECKLES Dominant Recessive D_ dd

7. EYE COLOR Dominant Recessive D_ dd

8. CYSTIC FIBROSIS Not Having the Condition is Dominant Having the Condition is Recessive 1/2500 in Caucasians SICKEL CELL DISEASE Not Having the Condition is Dominant Having the Condition is Recessive 1/400 in African Americans

9. BLOOD TYPE A,B,AB & 0 A B Co-dominant O Recessive Type A=AA or AO, Type B=BB or BO Type AB=AB, Type O=OO

10. BLOOD Rh FACTOR Rh Positive is Dominant Rh Negative is Recessive

11. COLOR BLINDNESS No Color Blindness is Dominant Color Blindness is Recessive 1/12 Males, 1/250 Females

12. DWARFISM AA Genotype is fatal (usually still born) Aa is a Dwarf aa is Normal A is Dominant a is Recessive

13. HUNTINGTON’S DISEASE Having the Condition is Dominant Not Having the Condition is Recessive 1/25,000 the Population HEMOPHILA Not Having the Condition is Dominant Having the Condition is Recessive

14. ALBINISM Not Having the Condition is Dominant Having the Condition is Recessive

15. CLEF CHIN Dominant Recessive D_ dd

16. CONNECTED EYEBROWS Dominant Recessive D_ dd