Card Set Information
What is a multifactoral trait?
Trait caused by both genetics and environment.
***not sex-linked, not mendelian
What type of graph is representative of
Additive polygenic model
Bell-Curve (25%, 50%. 25%), Majority is average
The 50% will contain one or two dominant (Aa, AaBb, AAbb, aaBB, AaBb)
What happens to the
when utilizing one type of population?
What is the main difference b/t
: qualitative, all-or-nothing, liability curve
: quantitative, average, bell curve
Why do individuals exceed threshhold of liability?
1) many genetic factors
2) environmental factors
If a population or sex has a higher threshhold of liability, will the occurrence rate be high or low?
What are two factors used to predict
1) Less recurrence risk when degree of relatedness is less
2) A more severe condition in a proband of a family equals a higher recurrence
1) Increases when more family members are affected
2) Increases if proband is the less commonly affected sex
3) Increases with more severe phenotype
4) Decreases is lesser degrees of relatedness
What are the true definitions of "nature" and "nurture"?
Are monozygotic twins different b/c of genetics or environment?
Environment b/c from same fertilized egg = same genes
Are dizygotic twins different b/c of genetics or environment?
More genetics, 50% just like any other kid
When twins share a trait
When twins do not share a trait
The higher the number, the more chance the trait is a reflection of genetics
What is the