Application of Recombinant DNA Technologies in Medicine:
- Definition: Recombinant DNA technology involves combining DNA molecules from different sources into one molecule to create new genetic combinations.
Applications:
- Production of insulin: Using recombinant DNA technology, human insulin can be produced in large quantities by inserting the human insulin gene into bacterial cells.
- Growth hormone therapy: Recombinant DNA technology allows for the production of human growth hormone, which can be used to treat growth disorders.
- Gene therapy: Recombinant DNA techniques are used to introduce therapeutic genes into patients' cells to treat genetic disorders.
DNA Polymorphisms:
- Definition: DNA polymorphisms are variations in DNA sequences among individuals or populations.
Types:
- Single nucleotide polymorphisms (SNPs): Variations in a single nucleotide base pair.
- Insertions/deletions (indels): Variations involving the insertion or deletion of nucleotide bases.
- Significance: DNA polymorphisms serve as genetic markers for identifying individuals or populations and are used in various applications, including forensics, paternity testing, and disease susceptibility studies.
Detection of Mutations by Allele-Specific Probes and by PCR:
Allele-Specific Probes:
- Definition: Probes designed to hybridize specifically with a target allele containing a known mutation.
- Application: Used in molecular diagnostics to identify specific mutations associated with genetic diseases.
Polymerase Chain Reaction (PCR):
- Definition: PCR is a technique used to amplify a specific DNA sequence.
- Application: PCR can detect mutations by amplifying the DNA region containing the mutation, enabling its detection through various methods such as gel electrophoresis or sequencing.