HUMAN TRAITSPHENOTYPES

AND

GENOTYPES

EAR LOBES

May be free or attached. Free (A) is dominant over

attached (a).

BENT LITTLE FINGER

The end segment of the pinkie finger may be straight (bb) or bent toward your ring finger (B)

HITCH-HIKERS THUMB

A STRAIGHT THUMB (T) IS DOMINANT TO A THUMB WHICH CAN BE BENT AT A 45º ANGLE, HITCH-HIKER (t)

DIMPLES

One or more depressions in cheek when smiling is a dimple. (D) dimple is dominant to no dimples (d)

FRECKLES

FRECKLES ARE DOMINANT (F) TO NO FRECKLES (f)

WIDOW’S PEAK

Widow’s peak is dominant (P) over straight or curved hair lines (p).

TONGUE-ROLLER

Ability to roll the tongue longitudinally is dominant (R) to a non-roller (r)

TONGUE FOLDER

A folder (F) is dominant to a non-folder (f). The tongue is extended and the tip is bent backwards without the aid of your teeth or lips.

MID-DIGITAL HAIR

The presence of hair on the middle segments of your fingers (H) is dominant to no hair (h).

PTC TASTER

The ability to taste phenylthiocerbenide (PTC) is dominant (P) to being a non-taster (p).