1. Genetics

2. What do the words GENETICS or HEREDITY mean to you?
Genetics - the variation of inherited characteristics.
Heredity - the passing on of physical or mental characteristics genetically from one generation to another.
What traits or characteristics did you get (inherit) from your parents?
Usually physical appearances are easy to spot.
Do you look like your brother/sister/other family members? How so?

3. Human Traits
You may have some traits like your classmates, even though you are not related.
These traits usually go unnoticed.
There are numerous traits in humans, but some traits occur more frequently than others.
These are called high frequency traits.
We’re going to see who has each of the following high frequency traits.

4. Tongue Rolling
70% can roll
30% can’t roll

5. Handedness – Are you right or left handed?
93% right handed

6. Hand Clasping – Fold your hands together interlocking your fingers
Hand Clasping – Fold your hands together interlocking your fingers. Which thumb is on top (left or right)?
45% right on top
55% left on top

7. Hairline Shape – Widow’s Peak or Straight Line

8. Vulcan (Fingers Spread 2 by 2)

9. Dimples vs. No Dimples

10. Attached vs. Detached Earlobes

11. Bent Pinkie vs. Straight Pinkie

12. Hitchiker’s Thumb

13. Second Toe Longer than First Toe?

14. What’s behind these Inherited Traits
What’s behind these Inherited Traits? Punnett’s Square – Big letters represent dominant alleles and little letters represent recessive alleles. ¼ chance you’ll inherit a trait.

15. Dominant vs Recessive Genes