Human Traits
Human Characteristics Lab
Name_______________________________ Period_____________
Instructions: Get with a partner and determine your phenotype for each of the traits listed
below. Identify as much of your genotype as you accurately can.
Homework: Determine the phenotype and genotype of your parents. (If you do not have access
to one or both of your parents, determine the phenotype and genotype of your siblings, if siblings
are not available, see me to find another method to complete this assignment.) When you have
completed identifying your parent's traits, see if you can further determine your own genotype.
ANALYSIS QUESTIONS
To be answered and turned in with your data after the lab is completed.
1. Which traits, in general, are you able to determine a genotype for? Why?
2. Which traits are you NOT able to determine a full genotype for? Why?
3. How might you determine the genotypes for those traits discussed in question 2?
4. Are dominant traits always the most common? Why or why not?
Data Table
Trait
Attached ear lobe. (ee)
Unattached ear lobe.
Blue eyes. (bb)
Non blue eyes.
Widows peak.
Non widows peak. (ww)
Tongue roller.
Non tongue roller. (rr)
Bent pinkie.
Straight pinkie. (pp)
Hair on mid joints.
No hair on mid joints. (hh)
Red hair. (nn)
Any other color of hair.
Curly hair (CC)
Wavy hair (Cc)
straight hair (cc)
PTC taster.
Non PTC taster. (aa)
Cleft chin. (cc)
Non cleft chin.
Almond eyes.
Round eyes. (aa)
Eyes straight.
Eyes slanted. (ss)
Bushy eyebrows.
Fine eyebrows. (bb)
Connected eyebrow. (cc)
Non-connected eyebrow.
Freckles.
No freckles. (ff)
Dimples.
No dimples. (dd)
Hitchhiker's thumb. (hh)
Non hitchhiker's thumb.
Cross right thumb over left(tt)
Cross left thumb over right.
Right handed.
Left handed. (hh)
Your Phenotype /
Genotype
Mom's
Phenotype/genotype
Class Data
Dad's
# WITH
Phenotype/genotype
recessive
Trait Information
Trait
Attached ear lobe.
(ee)
Unattached ear lobe.
Widows peak.
Non widows peak.
(ww)
Tongue roller.
Non tongue roller. (rr)
Bent pinkie.
Straight pinkie. (pp)
Examples/Extra Information
Hair on mid joints.
No hair on mid joints.
(hh)
PTC taster.
Non PTC taster. (aa)
Mrs. Robson will issue this test in class.
Cleft chin. (cc)
Non cleft chin.
Almond
Round
Straight
Slanted
Almond eyes.
Round eyes. (aa)
Eyes straight.
Eyes slanted. (ss)
Make sure that when you do this one you are marking your natural state.
(before plucking etc)
Connected eyebrow.
(cc)
Non-connected
eyebrow.
Connected Brow
Not-connected Brow
Dimples.
No dimples. (dd)
Hitchhiker's thumb.
(hh)
Non hitchhiker's
thumb.
Put your hands together, interlocking your fingers. Which thumb is on top?
Cross right thumb
over left(tt)
Cross left thumb over
right.