Name:_____________________ Date:_____________ Period:______
Human Genetics
Trait Description
Yourself
Class numbers
Tongue rolling
Bent little fingers
Widow’s peak
Hitchhiker’s Thumb
Hand clasping, left over right thumb
Arm folding fold your arms across your
chest/stomach…which one is on top?
Right
Left
Free earlobe
Chin cleft
Hair on middle joints of fingers
Curly hair
Eye Color
Brown
Blue
Tongue Rolling
Hitchhiker’s thumb
Widows Peak
Blue eyes When a person is homozygous for a recessive gene no
pigment is deposited in the from part of the eye and a blue layer at the
back of the iris shows through. A dominant gene, allows pigment to
be deposited which masks the blue color. Other genes are responsible
for the type and amount of this pigment leading to various shades of
brown, hazel, green and other colors.