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Family Pedigree Chart
95
Earlobe genotype/phenotype:
EE- Dominant (unattached earlobes)
Ee- Dominant (unattached earlobes)
ee- Recessive (attached earlobes)
My Family Pedigree
Can you hEAR me now?
By: Kyle Berardi
E
e
Ee
e
ee
MorMor
E
e
Grandpa
ee
Ee
Ee
e
Ee
Grandpa
P Generation
Grandma
Genotype: Ee
Phenotype: unattached earlobes
Genotype: ee
Phenotype: unattached earlobes
Genotype: EE
Phenotype: unattached ear lobes
Genotype: ee
Phenotype: attached ear lobes
Uncle Evan
E
e
Mom
Uncle Bennett
Genotype: Ee
Phenotype: unattached earlobes
EE
Ee
E
Dad
e
Ee
ee
F1 Generation
E
e
Ee
ee
Uncle David
e
Aunt Tammy
Genotype: Ee
Phenotype: unattached earlobes
Genotype: ee
Phenotype: attached earlobes
Ee
ee
Genotype: Ee
Phenotype: unattached earlobes
Aunt Cheryl
E
Uncle John
EE
E
EE
Genotype: Ee
Phenotype: unattached earlobes
Genotype: ee
Phenotype: attached earlobes
Ee
e
Ee
Genotype: Ee
Phenotype: unattached earlobes
Genotype: EE
Phenotype: unattached earlobes
Me
Skyler
F2 Generation
Melissa
Genotype: EE
Phenotype: unattached earlobes
Alex
Genotype: Ee
Phenotype: unattached earlobes
Heather
Genotype: EE
Phenotype: unattached earlobes
Danielle
Genotype: ee
Phenotype: attached earlobes
Brittany
Blake
Genotype: Ee
Phenotype: unattached earlobes
Jessica
Genotype: Ee
Phenotype: unattached earlobes
Genotype: EE
Phenotype: unattached earlobes
Genotype: Ee
Phenotype: unattached earlobes
Genotype: EE
Phenotype: unattached earlobes
Ear lobes are controlled by a single gene.
You get one gene from your mother, and
one from your father. Earlobe attachment is an autosomal trait, which is controlled by genes on one of the 22 human autosomes. Two alleles with a single autosomal gene determine if you can inherit attached or unattached earlobes. Unattached earlobes are dominant, whereas attached earlobes are recessive. In this case, there are two forms of dominance for unattached earlobes, homozygous and heterozygous dominant. Attached earlobes are considered homozygous recessive.
Key
Unattached Earlobes
Unattached Earlobes
Attached Earlobes
Works Cited:
"Dominant & Recessive Characteristics." Blinn.com. Blinn College, n.d. Web. 01 Dec. 2013.
"Punnett Squares." Ellerbruch.nmu.edu. Nothern Michigan University, n.d. Web. 1 Dec. 2013.
"Ear Genes." Thehappyscientist.com. Robert Krampf, n.d. Web. 01 Dec. 2013.
"Dominant Trait: Definition, Example & Quiz." Education-portal.com. Education Portal, n.d. Web. 01 Dec. 2013.