Identifying the disease gene in human monogenic disorders
4 important questions on Identifying the disease gene in human monogenic disorders
What are multifactorial diseases?
- Each mutation has small effect on disease risk
- every person has different combination of sussceptibillity.
- selection against variants is weak
- variants can become common
- genes
- environment
- epi-genetic
What are monogenic diseases?
- Mutation have a strong effect om disease risk (high penetrance)
- selction against mutations often strong
- mutations therefore rare in population
Threshold model for multifactorial disorders, what does it say?
- Gives you information on when you get the disease
- you need a high number of risk factors to get the disease
- gives the liability (betrouwbaarheid)
- the threshold z is the biological limit past which disease develops
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What says the continuous risk model?
- how more genetic risk variants there are the more the risk there is to get the disease
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