Download Eye Color

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Have you ever wondered who you look
like more, your mother or father? The
answer can be found in your genes!
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The purpose for this project was to learn
more about genes and to figure out why
people look the way they do.
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Get pictures of offspring, their parents, & their
grandparents
Find out & compare phenotypes of the parents to
offspring.
Compare grandparents to parents.
Compare the children's appearance to
grandparents.
Record the data on the pedigree.
Does the offspring of two people have
more physical characteristics of their
mother or their father?
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A Gene is a physical unit of heredity. there is about
20,000 or 25,000 genes in the human body.
A pedigree is a chart that tells someone all of the
possible known phenotypes.
Phenotypes are physical traits you inherit from you
parents.
Genotype is internally coded inheritable information
carried by a living organism.
Recessive is when you produce little or no phenotype
when occurring in heterozygous conditions with
contrasting alleles.
Dominant is when a genetic trait is considered
dominant if it is expressed in a person who has only
one copy of that gene.
Camera
 Pictures of 4 family’s
 Paper suitable for writing/ making
diagrams
 Pencil
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Independent Variable~The family’s
being used for experimentation.
 Dependent Variable~The phenotypes
that we are being compared too.
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Pedigrees
Shaded=black (dominant)
Not shaded= Orange (recessive)
Carrier= Gray ( carries gene but doesn’t show it)
= passed away
Male
Female
Mating
P1
F1
F2
Mrs. Gossage’s family hair color:
 Brown (black)
 Blonde (orange)
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Eye Color:
Brown (dominant)
Nose size:
Shaded= broad
Not shaded= Narrow
F2
P1
F1
F2
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Black brown
Shaded= broad
 Not shaed= Narrow
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Gray means person is a carrier of genes
P1 F1
F2
P1
F1
F2
P1
F1
F 2 F3
Mrs.
bower
Mrs.
bower
Black =Shaded
 brown= Not shaded
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Mrs.
bower
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During our experiment, we figured out
most of our subjects inherited more
phenotypes from their father. Reasons for
this is because the mother had more
recessive genes than their father.
http://kidshealth.org/kid/talk/qa/what_is_ge
ne.html
http://ghr.nlm.nih.gov/handbook/basics/gen
e
Mrs. Morgan
 Mrs. Scott
 Ms. Bower
 Mrs. Gossage
 Mr. Smith
 Microsoft PowerPoint.
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