Human Traits

Human Traits

Human Traits: autosomal

1. Shape of face (probably polygenic)


Oval dominant, square recessive

2. Cleft in chin


No cleft dominant, cleft recessive

3. Hair curl (probably polygenic)
Assume incomplete dominance


Curly: homozygous
Wavy: heterozygous
Straight: homozygous

4. Hairline


Widow peak dominant, straight hairline recessive

5. Eyebrow size


Broad dominant, slender recessive

6. Eyebrow shape


Separated dominant, joined recessive

7. Eyelash length


Long dominant, short recessive

8. Dimples


Dimples dominant, no dimples recessive

9. Earlobes


Free lobe dominant, attached recessive

10. Eye shape


Almond dominant, round recessive

11. Freckles


Freckles dominant, no freckles recessive

12. Tongue rolling


Roller dominant, nonroller recessive

13. Tongue folding


Inability dominant, ability recessive

14. Finger mid-digital hair


Hair dominant, no hair recessive

15. Hitch-hiker's thumb


Straight thumb dominant, hitch-hiker thumb
recessive

16. Bent little finger


Bent dominant, straight recessive

17. Interlaced fingers


Left thumb over right dominant, right over left recessive

18. Hair on back of hand


Hair dominant, no hair recessive

19. Tendons of Palmar Muscle


Two tendons dominant, three tendons recessive