Genetics Investigating Human Traits. Investigating Human Traits 2/6/15 Key Question: What do we inherit from our parents? Initial Thoughts:

Genetics

Investigating Human Traits

Investigating Human Traits2/6/15

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• Paper tasting (PTC)• Widow’s peak• Attached earlobes• Curly/ Straight Hair• Freckles• Cleft chin• Eye color• Straight/ Bent little

fingers

• Dimples• Nose shape• Mid-digit finger hair• Dark/blonde hair• Non-red/red hair• Handedness

Trait Table Traits: Tongue Rolling

http://www.ncrtec.org/tl/camp/gene/curl.jpg

Trait Table Traits: Widow’s Peak

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://student.biology.arizona.edu/sciconn/heredity/graphics/nolobe.gif

http://www.edquest.ca/Projects/GHTS/FET.jpg

Trait Table Traits: Freckles on Face

http://www.szarvas.org/freckles.jpg

Taste Test

• http://learn.genetics.utah.edu/content/inheritance/ptc/

• PTC – No taste, bitter, extremely bitter• Sodium Benzoate – no taste, salty, bitter, sweet

Trait Survey

• You and your elbow partner will fill-out the hereditary traits results.

Human TraitsN

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Peo

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Traits

Analysis Questions

1. What is the conclusion of your graph?

2. What would happen if you were able to ask more people?

3. List your individual traits.

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

• We inherit genes from our parents which result in us having different traits.