Jonathan and Jerry are identical twins.Jonathan has been diagnosed with schizophrenia but Jerry has not.Which of the following explains how this might occur?
A) They developed from two separate fertilized eggs.
B) They had separate placentas during prenatal development.
C) While they have the same genes,they do not have the same number of those genes repeated in their genome.
D) They are fraternal twins,not identical twins.

Question

Quizplus · Accepted Answer

Identical twins share the same genes, but the expression of these genes can be influenced by various factors, including epigenetic changes and environmental influences. The statement about not having the same number of gene repeats (copy number variations) is a way to explain differences in conditions like schizophrenia between identical twins, acknowledging that genetics is not the sole determinant of such conditions.

Jonathan and Jerry Are Identical Twins