Download Two - ciese

Human Genetics
Is the dominant
trait
most prevalent?
We surveyed our class to see how many students
showed dominant or recessive traits. The seven
traits surveyed were, mid-digit hair, pinky, color
blindness, dimples, forelock, thumb, and types of ear
lobes. These results along with the rest of the results
submitted by students in the project were analyzed.
Class Hypothesis
Click here
Process & Results
• We totaled # of people surveyed and totals
for each trait .
• We decided if the dominant or recessive
trait was present for each of the 7 traits
examined in this project.
• We graphed our findings on excel.
What we know about ear lobes
• Free ear lobes are (d)
• Attached ear lobes are (r)
(d)=dominant
®=recessive
More things about Ear Lobes
is…
• Dominant ear lobes are free ear lobes.
Dominant ear lobes are those that hang
below the point of attachment to the head.
• Recessive are attached ear lobes.
Attached ear lobes are attached directly to
the side of the head.
Attached ear lobes, the recessive trait,
the most Common in this study.
ear lobes
2500
2000
1500
1000
500
0
Series1
ear
lobes
totol
free
att
was
PhotoPhoto Credits: .The
Amazing Picture Machine
PhotoPhoto Credits: .The
Amazing Picture Machine.
People with the trait
Trait Thumb Survey
1250
1200
1150
Series1
1100
1050
1000
straight
curved
dominant
recessive
Traits
Have you ever
looked at your
thumbs to see if
they are straight or
curved? If your
thumbs are curved
you have the
recessive trait. If
your thumbs are
straight then you
have the dominant
trait. For the thumb
trait dominant was
found most
prevalent!
Series1
2,500
2,000
1,500
1,000
500
0
TOTAL
WITH
WITH-OUT
The Recessive trait was the most
common
Dimples
Dimples,
are
dominant, Like this
they show
when you
smile.
They are
in dents in
your
cheeks .
Dimples
Dimples
1600
1400
1200
1000
Amount
800
surveyed
600
400
200
0
d
r
WITH
WITHOUT
By: Nick and Trevor
If you can’t see this
number you might be
color blind? The number
is 25. So are you color
blind?
We got this picture from
http://www.toledobend.com/colorblind/Ishih
ara.asp
The chart we came up with
Color Blindness
2500
2000
1500
1000
Series1
500
0
Present
Not Present
Trait
#2 A bent pinky is
recessive and the straight
pinky is dominant.
Pinkies
amout of people
1500
1000
Series1
500
0
Series1
bent
straight
981
1319
trait
White Forlock-Genetic Servey
2500
Number of People
• Our results with the White
Forelock is 158 people
which is 7% and with out
is 2142 people which is
93% of the people that
were surveyed. All
together there was 2310
people who were
surveyed. The recessive
trait was prevalent here.
2000
1500
1000
500
0
With Forlock
w/o forlock
Traits
Our Conclusion
•The Recessive
Traits were more
common.
Poplar Bluff 5/6 Grade Center
Poplar Bluff, MO
Ms. Carda’s 6th grade homeroom
Ideas for the future
If we were to do this study again, we’d like to
survey such traits as:
• Left/right handed
• Tongue rolling and
• Hair color