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Unformatted text preview: soil Genes and the Environment • Siamese Cats: – Born with light fur – Allele for dark hair is only expressed in cooler areas of the body Modes of disease inheritance Autosomal Dominant Disorders – A single faulty allele can cause damage even when there is a second functional allele Autosomal Recessive Disorders – A single faulty allele is NOT sufficient to cause damage. – Heterozygous individuals are carriers X-linked Disorders – Disorders controlled by genes on the X chromosome • Example of an X-linked disorder: Colorblindness • Pedigrees • Example Pedigree: Family history of colorblindness (X-linked) • Pedigrees • Example Pedigree: Analysis of a family history of albinism (autosomal recessive)...
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- Spring '11
- Genetics, recessive disorders, single faulty allele