Finding Your Genetic Match

Introduction:

Have you ever noticed that brothers or sisters often look alike?  Their inherited traits are what make their physical appearance so similar. An inherited trait is a particular genetically determined characteristic that distinguishes a person. The traits of children are determined by the traits that  are passed on from their parents. Some traits are obvious in a family --- a child's nose is shaped like their mother's nose, but some traits are less obvious. You may have similar traits to many of your classmates even though you are not related to them. Some examples of often un-noticed human traits are the ability or not to roll your tongue, attached or unattached earlobes, dimples or freckles, naturally curly or straight hair, hitchhiker's or straight thumb, straight or widow's peak hairline, smooth or cleft chin, or colorblindness or normal vision.

There are numerous traits in humans, but some traits occur more frequently than others.  Between 70-90% of the human population have free-hanging earlobes, can roll their tongue,  are right-handed, and can taste a chemical called PTC.  These traits are called high frequency traits.

Objective:

Students will determine the presence of certain high frequency traits in themselves & their classmates.

Materials:

Genetic Inventory sheet with pictures, paper, pencil, PTC taste strips.

Procedure:

  1. Identify which of the following 10 human traits you have by placing a check mark beside that trait.

  2. Compare the traits you have with other students in the classroom and find the student you most closely match.

 

Human Trait Inventory

Student:
Tongue Roller  
Non-Tongue Roller  
   
Attached Earlobes  
Unattached earlobes  
   
Dimples  
No Dimples  
   
Right-handed  
Left-Handed  
   
Widow's Peak  
Straight Hairline  
   
Left Thumb on top when Hands Crossed  
Right Thumb on top when Hands Crossed  
   
Hair on mid-digit of hand  
No hair on mid-digit of hand  
   
Bent little finger  
Straight little finger  
   
Second toe longer than big toe  
Second toe not longer than big toe  
   
Can Taste PTC  
Can Not Taste PTC  
   
Vulcan (Fingers spread 2 by 2)  
None Vulcan  
Class Match:

 

Tongue Roller Non Roller Dimples No Dimples
Attached Earlobes Unattached Earlobes Widow's Peak Straight Hairline
Longer Second Toe Short Second Toe Bent Little finger Hitchhiker's Thumb

Attached Ear lobes (left)
Unattached ear Lobes (right)

"VULCAN" or No "VULCAN" Dimples Right/Left Thumb on top


Hit Counter