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Friday notes CHFD 2200

Friday notes CHFD 2200 - Notes Many human genetic diseases...

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Notes 1/22/09 Many human genetic diseases are monogenic inheritance. - Recessive traits ex) cystic fibrosis, thick m ucus Chromosomal Abnormalities Mostly caused during m eiosis- four different divisions m ay caus e chromoso m e to divi a bnor m ally. Not all chromoso m es m ay s ep arat e resulting in a double chromoso m e. - Ex) Down Syndrom e (trisomy)- thre e chromoso m es on the 21 st chromosome (haploid + diploid) Sex Chromosome Abnormalities (23     rd    Chromosome)     Many combinations from error during meiosis Double from both parent or none (XxYy or X 0 Y 0 ) Reproductive Choices  1. Genetic counseling – parents can choose to look at genetic history and analyze/plan accordingly 2. Prenatal Diagnosis and Fetal Medicine 3. Adoption Genetic Counseling Recommended when 1) couple had difficulties 2) Aware of genetic problems 3) Woman is over 35 Helps couples assess the chances of hereditary disorders and choose the best course of action Prenatal Diagnostic Methods
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