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It is the process of examining a sample of blood or other body fluids or tissue for the diagnosis of vulnerabilities to inherited disease.<br>
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GENETICS • Branch of biology deals with study of genes,genetic variation and other heredity in organisms. • Genetic technologies help to develop targeted medicines for certain diseases. • Genetics offers wide range of applications. Eg: Genetic fingerprinting used to catch criminals.
GENETIC TESTING • It is the process of examining a sample of blood or other body fluids or tissue for the diagnosis of vulnerabilities to inherited disease.
TYPES OF GENETIC TESTING • Newborn Screening • Diagnostic Testing • Carrier Testing • Prenatal Testing • Preimplementation Testing • Predective and Presymptomatic Testing • Forensic Testing
NEWBORN SCREENING • To identify the genetic disorders of a newborn baby. • Can be treated early in life. • Phenylketonuria - genetic disorder that causes intellectual disability • Hypothyroidism- disorder of thyroid gland
DIAGNOSTIC TESTING • To identify a specific genetic or chromosomal condition. • Can be performed before birth. • Also be done at any time in persons life. • Can influence a person’s health care choice. • Helps to manage the disorder.
CARRIER TESTING • Identification of person who carry one copy of gene mutation. • Used in persons having family history of genetic disorder
PRENATAL TESTING • To detect changes in a fetus’s genes or chromosomes before birth. • Testing is offered during pregnancy. • Cannot identify all possible inherited disorders and birth defects.
PREIMPLEMENTATION TESTING • Known as Preimplementation Genetic Diagnosis (PGD) • Reduces the risk of having a child with a particular genetic or chromosomal disorder. • Detect genetic changes in embryos created in in-vitro fertilization.
PREDECTIVE AND PRESYMPTOMATIC TESTING • Done after birth. • To detect gene mutation associated with disorders. • Predective testing- identify mutations eg:cancer • Presymptomatic testing - determine whether a person will develop a genetic disorder. • Help with making decision about medical care.
FORENSIC TESTING • Uses DNA sequences to identify an individual for legal purposes. • Not used to identify gene mutation. • Helps to identify the crime. • To establish biological relationships.