To survey the occurrence of the following genetic traits

among the students in a class, then in their families

Attached and free earlobes

Hitch-hiker's Thumb and Straight thumb

Widow’s peak and Straight hairline

Tongue rolling and lack of Tongue rolling

ATTACHED EARLOBESRecessive

FREE EARLOBESDominant

HITCH-HIKER'S THUMB Dominant

STRAIGHT THUMB THUMB Recessive

STRAIGHT HAIRLINE Recessive

WIDOW’S PEAKDominant

ABILITY TO ROLL TONGUE Dominant

LACK OF ABILTY TO ROLL TONGUE Recessive

Use this data table to keep track of the traits listed above.

There are _____ people in class today.

Each member of your group will choose one of the above traits.

Circulate around the room, surveying & recording the numbers of each

allele for your trait, until you have a response from every person in class.

Fill in the first 4 columns of your data table.

Return to your group and exchange data.

Calculate the percentages for each trait.

Fill in these numbers on your data table.

For example Total students = 20

5 can roll tongue = x5 =25%

100

5

Pick letters to represent traits, like abbreviations.

The dominant allele is written with a capital letter.

The recessive allele gets a lower case letter.

W = dominant widow's peak allelew = recessive straight hairline allele

E = Free Ear Lobes ( dominant)e = Attached Earlobes (recessive )

H = Hitch-hiker's Thumbh = Straight Thumb

R = Tongue rollingr = lack of tongue rolling ability

Pick letters to represent traits, like abbreviations.

The dominant allele is written with a capital letter.

The recessive allele gets a lower case letter.

W = dominant widow's peak allelew = recessive straight hairline allele

E = Free Ear Lobes ( dominant)e = Attached Earlobes (recessive )

H = Hitch-hiker's Thumbh = Straight Thumb

R = Tongue rollingr = lack of tongue rolling ability