PSB-2000 Study Guide - Quiz Guide: Saltatory Conduction, Paroxetine, Sodium-Potassium Alloy
Document Summary
Estimate of how much of the variance in a characteristic (within a population) is due to differences in heredity (genes) Identical twins (monozygotic)> fraternal twins (dizygotic) -> high heritability. Identical twins (monozygotic) = fraternal twins (dizygotic) -> low heritability. Mz twins share chorion and blood supply (ie, more similar prenatal environment compared to dz twins) So could be genetics or could be prenatal environment: adoption studies. Biological children of low iq or mentally ill parents tend to have similar problems even if raised by great adoptive parents. Could be genetics but could be reflection of poor prenatal environment. Inherited or genetic does not necessarily equal unmodifiable (although sometimes it does) Elevated plus maze: some genetic strains tend to stay in walled arms; others venture out onto open arms. But sometimes a strain that is unadventurous in one lab is more adventurous in another. Depends on exactly how the researchers handle the mice, maybe odors in the room .
