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1. Meiosis I and Meiosis II drawings 2. Meiosis I vs. Meiosis II Venn Diagram 3. Mitosis vs. Meiosis I Venn Diagram 4. Meiosis Simulation Lab 5. Take a Class Survey 6. Mendelian Genetics Activity 7. 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. Procedure Observe 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. Data Dominant Trait Number of Students Recessive Trait Number of Students Boys

Girls

Total

Boys

Girls

Total

Widow's Peak

2

7

8

Straight Hairline

3

2

5

Free Earlobes

3

5

8

Attached Earlobes

2

4

6

Cleft Chin

1

1

2

Smooth Chin

5

7

12

Dimples

3

3

6

No Dimples

3

5

8

Left Thumb Clasping

3

4

7

Right Thumb Clasping

3

4

7

Can Roll Tongue

6

5

11

Can Not Roll Tongue

0

3

3

Freckles

3

6

9

No Freckles

2

3

5

Right-handed

4

9

13

Left-handed

1

0

1

VI. Analyze and Conclude 1. 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.


Family Member

Free Earlobes

No Yes Yes Yes Yes Yes Attached Earlobes Yes No

No No No No

Jack

Tommy

No No No Yes

CJ

Dad No

Jack

No

CJ

Yes Yes Yes Yes Yes Yes Straight Hairline

Tommy

Widow's Peak

Dad

Mom

Andrew

Recessive trait Andrew

Family Member Mom

Dominant trait

Cleft Chin

No No No No No No

Smooth Chin

Yes Yes Yes Yes Yes Yes

Dimples

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

Freckles

Yes Yes No Yes No No

No Freckles

No

No Yes No Yes Yes

Right-handed

Yes Yes Yes Yes Yes Yes

Left-handed

No

No

No No No Yes

No No No No



9th Grade Quarter 2 E-Portfolio