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17 Cards in this Set
- Front
- Back
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Consanguinity
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descent from a single common ancestor
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Penetrance
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The frequency, under given environmental conditions, with which a specific phenotype is expressed by those individuals with a specific genotype
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Expressivity
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the degree to which a particular gene produces its effect in an organism
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Pedigree Analysis:
Circle Square Diamond Number inside shape |
girl
boy sex unknown # of siblings |
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PA:
P Strikethrough SB Arrow Arrow + P |
pregnant
death stillbirth person seeking counseling first affected family member coming to medical attention |
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Pedigree construction:
partners relationship no longer exists siblings preg not carried to term |
male on left
Break in relationship line listed left to right in birth order triangle w/line shortened compared to siblings |
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twins
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vertical line split
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family history unknown
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Question mark on top
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no descendents
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upside down 'T'
double line = infertility |
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adoption
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Brackets
use dashed and solid lines for extramarital social and biological relationships |
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SAB
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spontaneous abortion
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TOP
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termination of pregnancy
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Consanguinity
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marriage or mating between two persons that are ‘blood relatives’, meaning they have at least one relative in common
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Incest
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mating between two first degree relatives
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1st degree relatives
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mom, dad, siblings
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2nd degree relatives
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anyone who contributes to your DNA, offspring of a contributor, or who contains part of your DNA that isn’t primary: grandparent, aunts/uncles, nieces/nephews, grandchildren, half siblings
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3rd degree
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first cousins, great aunts and uncles
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