Identical twins are referred to as what?

Non identical twins are referred to as what?

What % of genes are shared by MZ twins?

What % of genes are shared by DZ twins?

Define a twin study

Would 2 MZ or 2 DZ twins who've been reared together be more similar according to the bioloigcal approach. Why?

If a characteristic were entirely a product of our genes what would we expect from MZ twins?

Give a strength of twin studies (applicability)

Give a weakness of twin studies (2 measurable)

Give a weakness of twin studies (MZ vs DZ)

Define a twin study in simple terms