If Fraternal (Or Dizygotic) Twins Are More Likely to Be

question 78

Multiple Choice

If fraternal (or dizygotic) twins are more likely to be concordant for a trait than other siblings, can it be concluded that the higher concordance rate is due to the greater degree of genetic relatedness?

• A) Yes.
• B) Yes, but only if the siblings studied are of the same sex and age.
• C) No, because the greater similarity can be attributed to environmental influence.
• D) No, because fraternal twins are no more genetically alike than other siblings.

---

Definitions:

Durable Power of Attorney

A legal document that grants a trusted person the authority to act on another's behalf, especially in financial or healthcare decisions, and remains effective if the grantor becomes incapacitated.

Subsequent Incapacity

The condition of becoming unable to perform or fulfill certain duties or responsibilities after entering into a legal agreement or contract.

Accounting

The process of recording, classifying, and summarizing financial transactions to provide an accurate picture of a business's financial health.

Pharmaceutical Company

A business involved in the research, development, production, and marketing of medications and drugs for the diagnosis, treatment, or prevention of disease.