1. Get to know yourself
It’s all in the genes

2. Do you have dark or light hair?
Dark hair is dominant.
Dominant genotypes
DD or Dd
Recessive genotype dd

3. Are you right or left handed?
Right handedness is dominant.
Dominant genotypes
RR or Rr
Recessive genotype rr

4. Is your ear lobe free or attached?
The gene for free earlobes is dominant.
Dominant genotypes
EE or Ee
Recessive genotype ee

5. Do you have freckles? Freckles are dominant. Dominant genotypes
FF or Ff
Recessive genotype ff

6. Can you roll your tongue?
Tongue rolling is dominant.
Dominant genotypes
TT or Tt
Recessive genotype tt

7. Are your little fingers curved or straight?
Curved little fingers are dominant.
Dominant genotypes
CC or Cc
Recessive genotype cc

8. Do you have brown or blue eyes?
Brown eyes are dominant.
Dominant genotypes
BB or Bb
Recessive genotype bb
David Bowie has one of each!

9. Which arm is on top when you cross them?
Right arm on top is dominant.
Dominant genotypes
AA or Aa
Recessive genotype aa

10. Is your thumb curved or straight?
Straight thumbs are dominant.
Dominant genotypes
TT or Tt
Recessive genotype tt

11. Is your second toe longer than your big toe?
Longer second toes are dominant.
Dominant genotypes
SS or Ss
Recessive genotype ss
Note: Do not take your shoes off to check if you have already had PE today!

12. … what’s special about these toes?
And finally…
… what’s special about these toes?

13. Some vocabulary you may now know
Variation
Continuous
Discrete
Dominant
Recessive