Investigating Human Traits Genetics Investigating Human Traits

Investigating Human Traits 2/14/13 Key Question: What do we inherit from our parents? Initial Thoughts:

Characteristic vs. Trait Characteristic - i.e. Eye Color Trait - different versions of a characteristic; i.e. brown, blue, green How much variation is shown in our class?

Evidence: Trait Survey Tongue rolling Wiggle your ears Finger crossing Hitchhikers thumb Paper tasting Freckles Height Cleft chin Widow’s peak Eye color Attached earlobes

Trait Table Traits: Tongue Rolling http://www.ncrtec.org/tl/camp/gene/curl.jpg

Trait Table Traits: Thumb Position

Trait Table Traits: Widow’s Peak No peak! http://images.google.com/imgres?imgurl=student.biology.arizona.edu/sciconn/heredity/graphics/widow2.gif&imgrefurl=http://student.biology.arizona.edu/sciconn/heredity/worksheet_heredity.html&h=131&w=100&prev=/images%3Fq%3Dwidow%2527s%2Bpeak%26start%3D20%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DN

Trait Table Traits: Not Attached vs. Attached Earlobes http://www.edquest.ca/Projects/GHTS/FET.jpg http://student.biology.arizona.edu/sciconn/heredity/graphics/nolobe.gif

Trait Table Traits: Hitchhiker’s Thumb http://www.fremont.oxnardsd.org/genetic/images/thumbs.jpg

Trait Table Traits: Freckles on Face http://www.szarvas.org/freckles.jpg

Cleft Chin

Human Traits Number of People Traits

Analysis Questions What is the conclusion of your graph? What would happen if you were able to ask more people? List your individual traits in the following chart: Characteristic Traits Number of traits Eye Color Tongue Rolling Finger Crossing PTC tasting Height Arm Span

Summary What did you think about the variation of human traits before this lesson? What does your evidence show you that you learned about the variation of human traits? What are some thoughts or questions you have about human traits?

Reflection Create an analogy for characteristics and traits.

Big Idea