Question

Siblings share ____$\%$ of their genes while fraternal twins share ____$\%$ and identical twins share ____$\%$ of their genes (on average).

• A. 50, 50, 50
• B. 100, 100, 50
• C. 100, 100, 100
• D. 50, 50, 100

Answer 1

The correct option is D

50, 50, 100

Identical twins have the same genetic makeup; however, they may not look exactly identical to one another. Identical twins thus, share 100% of their DNA. Siblings and fraternal twins on an average, share 50% of their genes, i.e., close to half of their genetic makeup is similar to that of each other.