Heredity and environment interact dynamically throughout development. We know that a genotype is expressed differently when it is exposed to a different environment. We also know that the environment can trigger genetic expression

Explain this constant connection between nature and nurture. Be sure to give examples and discuss epigenesist in your explanation.
What will be an ideal response?

A good answer will be similar to the following:
A genotype leads to a phenotype, but only if the environment cooperates in the usual manner. For example, PKU can only be expressed when children inherit a recessive gene on the long arm of chromosome 12 from both parents. If parents know their infant has the genotype for the disease, infants are placed on a diet that limits phenylalanine and the disease does not appear. In addition, children's experiences can help to determine when and how genes are activated. For example, teenage girls begin to menstruate at a younger age if they've had a stressful childhood. There is a constant interaction between genetic instructions and the nature of the immediate cellular environmental factors, which is known as epigenesist.