Imagine you have a twin who has just been diagnosed with major depression.Are your chances of showing symptoms of this disorder affected by whether he or she is an identical or a fraternal twin?

Question

Quizplus · Accepted Answer

Identical twins share all of their genes, while fraternal twins share about half of their genes on average. Research has shown that there is a higher concordance rate for major depression among identical twins compared to fraternal twins. This suggests that genetics play a role in the development of major depression, and that having an identical twin with the disorder would increase your likelihood of developing it as well. Additional factors, such as the presence of depression in other family members or environmental factors, may also influence your risk. Gender is not a significant factor in this case.

Imagine You Have a Twin Who Has Just Been Diagnosed