9th Grade Quarter 2 E-Portfolio

1. Meiosis I and Meiosis II drawings2. Meiosis I vs. Meiosis II Venn Diagram3. Mitosis vs. Meiosis I Venn Diagram4. Meiosis Simulation Lab5. Take a Class Survey6. Mendelian Genetics Activity7. DNA Replication and Protein Synthesis

Take a Class Survey

I. Problem: Are certain traits controlled by dominant alleles more common than those controlled by recessive alleles?

II. Hypothesis: I predict that the dominant traits will be more common.

III. Materials: Mirror (optional)

IV. ProcedureObserve each person in your class including the teacher and yourself for a widow's peak or straight hairline, free or attached earlobes, a cleft or smooth chin, dimples, left or right thumb clasping, the ability to roll the tongue, freckles, and right or left-handedness. Record your results in a table.

V. DataDominant Trait Number of Students Recessive Trait Number of Students

Boys Girls Total Boys Girls TotalWidow's Peak 2 7 8 Straight Hairline 3 2 5Free Earlobes 3 5 8 Attached Earlobes 2 4 6

Cleft Chin 1 1 2 Smooth Chin 5 7 12Dimples 3 3 6 No Dimples 3 5 8

Left Thumb Clasping 3 4 7 Right Thumb Clasping 3 4 7Can Roll Tongue 6 5 11 Can Not Roll Tongue 0 3 3

Freckles 3 6 9 No Freckles 2 3 5Right-handed 4 9 13 Left-handed 1 0 1

VI. Analyze and Conclude1. Did more students have dominant or recessive traits?It varied by trait. Some people had more recessive than dominant such as having a smooth chin and others had more dominant traits such as right-handedness.

2. What does this experiment suggest about the frequency of certain traits in a population?It suggests that dominant traits occur more frequently than recessive traits in the class as a whole.Other traits have a balance between dominant and recessive, such as the clasping of the thumb.

3. Conduct the same experiment with your family members. Are they similar to you?See next page.They were except for the fact that both parents had freckles but I did not.

Dominant trait Family Member Recessive trait Family Member

Mom Dad

Tom

my CJ

Jack

And

rew

Mom Dad

Tom

my CJ

Jack

And

rew

Widow's Peak Yes Yes Yes Yes Yes Yes Straight Hairline No No No No No YesFree Earlobes No Yes Yes Yes Yes Yes Attached Earlobes Yes No No No No No

Cleft Chin No No No No No No Smooth Chin Yes Yes Yes Yes Yes YesDimples Yes Yes No No Yes Yes No Dimples No Yes Yes Yes No No

Left Thumb Clasping

Yes No No No Yes No Right Thumb Clasping

No Yes Yes Yes No Yes

Can Roll Tongue Yes Yes Yes Yes Yes No Can Not Roll Tongue

No No No No No Yes

Freckles Yes Yes No Yes No No No Freckles No No Yes No Yes YesRight-handed Yes Yes Yes Yes Yes Yes Left-handed No No No No No No