Genetic Screening Flashcards

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What is genetic screening?

Genetic screening is testing DNA from a person or an embryo. It looks for alleles that may cause genetic disorders.

What is a genetic carrier?

A genetic carrier has one copy of a recessive allele for a disorder. They do not show any symptoms of the disorder.

How can carrier screening help parents who want a baby?

Carrier screening can show if both parents are carriers. This helps them know how likely it is that a child will have the genetic disorder.

What is prenatal genetic screening?

Prenatal genetic screening is testing during pregnancy. It finds out if the foetus has alleles for certain genetic disorders.

What is newborn genetic screening and why is it done?

Newborn genetic screening is testing blood from a new baby. It looks for certain genetic disorders so treatment can start early if needed.

Name one genetic disorder that can be looked for using genetic screening.

Cystic fibrosis is one genetic disorder that can be found using genetic screening.

Give one possible benefit of genetic screening.

Genetic screening can warn people about a high risk of a disorder. They can then plan treatment or make informed choices about having children.

Give one possible problem or risk of genetic screening.

One problem is that some tests on a foetus carry a small risk of causing a miscarriage.

What is a false positive result in genetic screening?

A false positive result is when the test says a person or foetus has a disorder or risky allele. In fact they do not.

What is a false negative result in genetic screening?

A false negative result is when the test says a person or foetus is free of a disorder or risky allele. In fact they do have it.