Testing And Treating Genetic Disease Flashcards
If you are homozygous recessive for a gene, what type of alleles do you carry?
2 identical ones
What is the difference between an organism’s genotype and a phenotype
Genotype is - all the genes it has
Phenotype is - what characteristics an organism displays
What type of allele causes cystic fibrosis
Recessive
What is the physical result of having cystic fibrosis
Difficulty coughing
Thick mucus
Difficulty breathing
What does it mean to be a ‘carrier’ of cystic fibrosis
You only have one copy of the allele
What does a Punnett square show?
The chance of a genetic cross
What does a genetic test analyse?
If they have a certain genetic disorder
When is an antenatal test carried out?
During the pregnancy when the child isn’t at risk
Who is offered an antenatal test?
Mothers
When are neonatal tests carried out
When the baby is born
What is the benefit of using PGD
You can find out if they’ll have a genetic disorder
Why might people want to know if they have the allele for Huntington’s disease
Increase they pass it onto their child
Why might insurance companies want to know your genotype?
They may refuse to give life insurance to the people with the wrong allele
What is a ‘recessive allele’
One copy of an allele that won’t show the symptoms of the disorder
