Heredity and Genetics 

Trait Name

Dominant

Recessive

Tongue Rolling

T-

tt

Attached Earlobes

E-

ee

Innerlocking Fingers

I-

ii

Dimples

D-

dd

Sex

XX

XY

Bent Little Finger

L-

ll

Double Jointed Thumb

J-

jj

Freckles

F-

ff

PTC Taste (omit)

P-

pp

Sodium Benzoate Taste (omit)

S-

ss

Widows Peak

W-

ww

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