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?
A) No; both types of twins have equal susceptibility rates.
B) Yes; your chances are much greater if you are an identical twin.
C) It depends on whether you have other relatives who have also experienced depression.
D) It depends on whether you are a male or a female.

Question

Quizplus · Accepted Answer

Identical twins share 100% of their genetic material, whereas fraternal twins share approximately 50%. Therefore, if one identical twin is diagnosed with major depression, the other has a much higher chance of also experiencing symptoms compared to a fraternal twin. This indicates a strong genetic component to the disorder. Other factors, such as environmental and social influences, may also play a role. The presence of other relatives with depression may further increase the likelihood of developing symptoms. Gender is not a significant factor in susceptibility to depression.

Imagine You Have a Twin Who Has Just Been Diagnosed