Examining Family Traits Through Pedigree Charts Essay

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Genetic Trait Phonotypes in My Family

The traits selected for this three-generation pedigree are freckles and hair texture. Freckles and curly hair show up as both recessive traits and dominant traits in my family. In the pedigree chart below, circles indicate female members of the family while males are indicated by squares. In the generations following my great grandparents, the symbols (circles, squares) that are red in color indicate the direct bloodline to me.

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The designations used in the pedigree chart for the dominant and recessive traits are as follows:

Freckles / FF = present; Ff = present; ff = absent

Hair texture / HH = curly; Hh = wavy; hh = straight

In scientific terms these relationships are described as:

dominant allele + dominant allele = dominant phenotype dominant allele + recessive allele = dominant phenotype recessive allele + recessive allele = recessive phenotype.....

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