The mass media report percentages of heritability. for various conditions. For instance autism is 90% heritable, height 80%, BMI 60%, musical aptitude 50%, depression 40%, breast cancer 30%. But these percentages are of no use to you, because they only apply to the population investigated, not in general. And they vary immensely between populations. Telling someone that their trait or illness has a specific heritability percentage is wrong.
Let the sunshine in
How would we manage, if we could not visualise three-dimensional objects from flat two-dimensional diagrams? An amazing feat our brain performs. What role does pre-determined programming play in this? That is related to how the sun shines on us.
Why are monozygotic twins not identical? Chance!
Monozygoicic twins share the same genes, but are not exact replicas of each other. How can this be? A result of what they – separately – have experienced? Or is it chance? How then?