Topic 6 Inherited Disorders Flashcards
What kind of allele is cystic fibrosis caused by
Recessive
What is cystic fibrosis a genetic disorder of
Cell membranes
What does cystic fibrosis result in 
The body producing a lot of sticky mucus in the air passages and in the pancreas
How common is the allele which causes cystic fibrosis
One person in 25
When will cystic fibrosis be shown
If both parents were carriers
What is polydactyly caused by
The dominant allele
What is polydactyly
Genetic disorder where are babies born with extra fingers or toes
What does IVF stand for
In vitro fertilisation
What happens during IVF
Embryos are fertilised in a laboratory and then implanted into the woman’s womb
What can be done before the fertilised embryos are implanted
To remove a cell from each embryo and analyse its genes to detect any genetic disorders
What else can be done to test if an embryo has disorders
Get some of its DNA
What happens if embryos with bad alleles were found
Would be destroyed
What could screening lead to
A decision to terminate the pregnancy
Against embryonic screening
Implies that people with genetic problems are undesirable and could increase prejudice
May want to do screen for other desirable aspects
Screening is expensive
For embryonic screening
Help stop people suffering
Treating disorders cost the government a lot of money
There are laws to stop it going too far
