Human Genetics

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.

Is the dominant

trait

most prevalent?

Class HypothesisClick 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.

0

5001000150020002500

earlobes

totol free att

ear lobes

Series1

Attached ear lobes, the recessive trait, was the most Common in this study.

PhotoPhoto Credits: .The Amazing Picture Machine.

PhotoPhoto Credits: .The Amazing Picture Machine

Trait Thumb Survey

1000

1050

1100

1150

1200

1250

straight curved

dominant recessive

Traits

Peo

ple

wit

h t

he t

rait

Series1

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!

0

500

1,000

1,500

2,000

2,500

TOTAL WITH WITH-OUT

Series1

Mid digit

hair is a

dominant

Trait. If

you have

It look on

your ring

finger.

The Recessive trait was the most common

Dimples Dimples,

are dominant, they show when you

smile. They are

in dents in your

cheeks .

Like this

0200400600800

1000120014001600

Amount surveyed

d r

WITH WITHOUT

Dimples

Dimples

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.toledo-bend.com/colorblind/

Ishihara.asp

The chart we came up with

0

500

1000

1500

2000

2500

Present Not Present

Trait

Color Blindness

Series1

#1 a trait o

f a pinky

comes from your

parents

generation.

#2 A bent pinky is recessive and the straight pinky is dominant.

#3 Hold your hands

together as if you are

covering your face, if

the tips of your

pinkies point away

from one another ,

then your pinkies are

bent

Pinkies

0

500

1000

1500

trait

am

ou

t o

f p

eo

ple

Series1

Series1 981 1319

bent straight

• 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.

White Forlock-Genetic Servey

0

500

1000

1500

2000

2500

With Forlock w/o forlock

TraitsNu

mber

of Pe

ople

Our Conclusion

•The Recessive Traits were more common.

Poplar Bluff 5/6 Grade Center

Ms. Carda’s 6th grade homeroom

Poplar Bluff, MO

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