Genetic Screening (Leaving Cert Biology): Revision Notes
📚 Revision Notes
Genetic Screening
infoNote
Genetic screening is DNA analysis for medical purposes to show the presence or absence of certain genes.
How It Works:
- Genetic screening uses techniques similar to those in DNA profiling.
- It identifies mutated genes by detecting abnormal or altered DNA sequences.
- Mutated genes are responsible for genetic disorders, such as:
- Cystic fibrosis: A build-up of mucous in the lungs.
- Hemochromatosis: A build-up of iron in the body.
Applications of Genetic Screening:
- If a couple knows one or both partners have a gene mutation, they can be informed about the likelihood of passing the disorder to their child.
- Based on this information, they can decide whether or not to have a child.
Ethical Considerations:
- If an embryo is tested and shown to have a genetic disorder, this may lead the couple to consider abortion.
- Such decisions raise important ethical issues about the use of genetic screening and its impact on families and society.