DOMINANT AND RECESSIVE TRAITS

1. Name: Mikka Aliah Billones Date Submitted: April 21, 2022
Section: Maliksi
Performance Task #1
DOMINANT AND RECESSIVE TRAITS
Objective: To determine the least and most common dominant and recessive traits among students in
the class.
Materials: Illustration of some common dominant and recessive traits in humans.
Trait Alleles
Dominant Recessive
Earlobes
Free (Yes) Attached (No)
Hitchhiker’s thumb
Absent (Yes) Present (No)
Widow’s peak (pull your
hair back)
Yes
No
Tongue Rolling
Yes No

2. Procedure
Make a survey of your class traits. Fill out the data table to keep track of their traits indicated above.
Trait Number of
“Yes”
Number of
“No”
Total % of Yes % of No
Earlobes 33 11 44 75% 25%
Hitchhiker’s
thumb
25 19 44 57% 43%
Widow’s peak 11 33 44 75% 25%
Tongue
Rolling
27 17 44 61% 39%
Questions for Analysis
1. Based on your survey class traits:
a. What combination of these traits do you have?
The combinations of traits I have are dominant free earlobes, dominant absent hitchhiker's
thumb, recessive widow's peak, and dominant tongue rolling.
b. What are the common traits among your classmates?
The common traits I have among my classmates are free earlobes, an absent hitchhiker's
thumb, no widow's peak, and tongue rolling.
2. Make a bar graph of the traits common among your group (number of students on the Y-axis,
traits on the X-axis)
3. From which of your parents do you think did you get these alleles?
I got my free earlobes and tongue rolling from both of my parents, but I got my absent
hitchhiker's thumb and no widow's peak from my father.
4. Cite three more traits you observed you possess. Find out if these traits follow complete
dominance pattern of inheritance. If these follow such pattern, what is the dominant and
recessive allele for each?
My other traits are pale fair skin, brown hair, and brown eyes. My pale light skin is recessive,
while my brown hair and eyes are dominant, and it follows a complete dominance pattern of
inheritance.
0
5
10
15
20
25
30
35
Earlobes Hitchhiker's Thumb Widow's Peak Tongue Rolling
TRAITS
Yes No

3. Conclusion
In conclusion, this activity demonstrates how many students have both dominant and recessive
alleles, as seen by the survey or graph, which reveals that the majority of students have both
alleles. It demonstrates that participants in this activity may inherit the same or different alleles
from their parents. This activity shows that not everyone has the same features and that we differ
in each one.