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Unformatted text preview: Allele contains different forms of genes from parents Phenotype o Observable and measurable genetic expressions of individual and physical characteristics Transmission o PKU as an example Both parents must carry recessive PKU gene for a 1 in 4 chance of inheriting PKU Polygenetic Inheritance and X-linked Genes o Combination of multiple gene pairs responsible for production of a particular trait o X-linked Genes Recessive genes that are located on the X chromosome Males have higher risk for disorders on X linked genes Causes of Developmental Abnormality o Genetics o Spontaneous mutation o Environmental factors lead to malformation Examples PKU Downs Syndrome Fragile X Sickle-cell anemia Tay-Sachs disease Klinefelters syndrome...
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- Fall '08
- Developmental Psychology