DOMINANT AND RECESSIVE TRAITS

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DOMINANT AND RECESSIVE TRAITS
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ATTACHED / UNATTACHED EARLOBES
UNATTACHED
ATTACHED
DOMINANT
RECESSIVE
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ROLLING YOUR TONGUE
ROLLER
NONROLLER
DOMINANT
RECESSIVE
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WIDOWS PEAK
WIDOWS PEAK
STRAIGHT HAIRLINE
DOMINANT
RECESSIVE
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HITCHHIKERS THUMB
STRAIGHT THUMB
HITCHHIKERS THUMB
DOMINANT
RECESSIVE
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PINKIES
BENT PINKIES
STRAIGHT PINKIES
DOMINANT
RECESSIVE
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CLEFT CHIN
NO CLEFT
CLEFT
DOMINANT
RECESSIVE
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SECOND TOES
LONGER SECOND TOE
SHORTER SECOND TOE
DOMINANT
RECESSIVE
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NUMBER OF FINGERS
SIX FINGERS POLYDACTYLY
FIVE FINGERS
DOMINANT!!!!
RECESSIVE
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Section 12.1 Summary pages 309 - 314

• A family tree traces a family name and various
  family members through successive generations.

• Through a family tree, you can identify the
  relationships among your cousins, aunts, uncles,
  grandparents, and great-grandparents.

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Section 12.1 Summary pages 309 - 314

• A pedigree is a family tree that traces an
  inherited trait.

• It is made up of a set of symbols that identify
  males and females, individuals affected by the
  trait being studied, and family relationships.

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Section 12.1 Summary pages 309 - 314
Pedigree Symbols
Ended Relationship Line
Male
Relationship Line
Female
Parent/Children Line
Affected male
Affected female
Male carrier of a recessive trait
Female carrier of a recessive trait
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• The generations are identified in sequence by
  Roman numerals

• Each individual is given a number. It always
  begins back at 1 for each generation, moving
  left to right.

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• If you are tracing a simple Dominant trait,
  people will either be shaded or they wont

• What would have to be the genotype of the people
  that are not shaded if you are tracing a Dominant
  trait?

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• If you are tracing a Recessive trait, you will
  need to shade in the people that have the trait,
  AND half-shade your known carriers.

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• Begin with a family tree.
• And then convert it into a pedigree.

• 1. You can either use your family or a
  friendsif you are adopted you can still
  use the adoptive family.
• 2. Choose which side of the family you want to
  track (moms or dads)
• 3. Choose which generation you want to begin
  with (keep in mind, you must use three
  generations AT LEAST)
• Choose an allele to track- ONLY ONE!
• If you choose right-handedness, youll only
  indicate people that use their right hands.you
  will NOT indicate people who use their left (it
  is implied)

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Then you can go back and change the names to
boxes and circles, and use the relationship lines
the pedigree calls for. Remember to use Roman
Numerals for generations and numbers for each
person in a generation My family is so ginormous,
I probably should have put it on a poster (good
idea for those with big fams.more room to work
withcause I even left people out
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Once you have the relationship lines, now
research your trait and shade in your affected
and carrying relatives. For my trait- anxiety is
DOMINANT
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For the last part of the visual, I marked
deceased relatives.
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Next, make a key of the symbols you used in your
pedigree. You do not need to include symbols not
shown in your visual.
Key
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Male Relative
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Female Relative
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Relationship
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Ended Relationship
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Fraternal Twins
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Those blessed with high anxiety
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Deceased
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Pedigree Project
Purpose of Project To learn how to read and
create a pedigree. To learn how to trace an
inherited trait.
Important Points to remember You do not have to
trace a trait in your own family. There needs to
be at least 3 generations shown. There needs to
be at least 8 family members. You can leave
people out if it gets too big or too
complicated. Rough Draft is due NEXT THURSDAY
12/8 WHEN YOU WALK IN -
complete the family tree and answer the
questions on the rough draft page.
- If you do not do this, I will notify home
that you did not show proof of project work and
will deduct 10 points from your final
grade. - On 12/8 you ONLY
need to turn in your rough draft paper, no binder
necessary yet Final Project is due Friday,
Jan. 6th- It is a TEST GRADE!!!!
- In your binder TOC entry, pedigree chart,
key, explanation, rough draft, and rubric
- Use your rubric as a checklist.
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Websites on dominant and rec. traits.
http//www.blinn.edu/socialscience/LDThomas/Feldma
n/Handouts/0203hand.htm http//www.ncbi.nlm.nih.g
ov/sites/entrez?dbomim http//www.highlands.edu/
academics/divisions/socialcultural/psych/johnson/h
nd-domrec.htm
Pick one Attached/Free Ear lobes,
Hitch-hikers thumb,
cleft chin, dimples,
Curling tongue,
Widows Peak, Longer second
toe, nearsighted (rec),
farsighted (dom.),
double jointedness (dom.),
right (dom.) or left (rec.) handedness,
freckles.. If there is another
trait that runs in your family and you would like
to use that for your project, please make sure to
get it approved before beginning the project.
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Doreston
Lollé Irene
Decide where you want to start, keeping in mind
you need to do AT LEAST 3 generations.






Michael
Kay
Jim
Ricky
Susan
Mark
Mary
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Pam
Joe
Janet
Marcia
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Jay
Then write out the second generation of siblings
only, first. Then you can add in spouses, so
you can see how much room you will need.
REMEMBER You dont have to include all
relationships. I chose to just use relationships
in which children were born.
Steph.
Allison
Damon
Adam
III
Jason
Sarah
Alex
Tammy
Dan
James
Vanessa
Rita
Hollye
Rebecca
Michael
Katie
Then write out the third generation. After that
add in spouses if necessary.
Then you must pick out a trait you want to trace.
You can do this by asking questions, looking at
pictures, ect. Pick something that is ruled by
simple dominanceI have a list.