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Genetics

QuestionAnswer
AA Trait shown, Dominant Aa Trait shown Dominant
aa Trait shown Recessive
Autosomal recessive, Defective chloride channels, Thick sticky mucus, Affects lungs and pancreas Cystic Fibrosis
Normal CF CF
Carrier CF cf
Disease cf cf
Autosomal dominant, one dominant allele causes disease, Symptoms begin in adulthood Huntington Disease
Healthy hd hd
Huntington Disease HD hd
Autosomal recessive, Lack of melanin production Albinism
Normal AA
Carrier Aa
Albino aa
Both alleles expressed Example: Type AB Blood Codominance
Trait is blended Example: Sickle-cell trait Incomplete Dominance
More than 2 allele choices Example: ABO Blood Group Multiple Alleles
Many genes determine one trait Example Height, skin color, eye color Polygenic Inheritance
One gene affects multiple traits Example: Marfan Syndrome Pleiotropy
Trisomy 21 Down Syndrome
Trisomy 18 Edwards Syndrome
Trisomy 13 Patau Syndrome
XO Turner Syndrome
XXY Klinefelter Syndrome
XXX Triple X
XYY Jacob Syndrome
Created by: chasmo9223
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