14
QuizMultiple Choice

Biological Perspective

Question 14 • SHS Alt Psychology S2 - 2021

Which statement about identical twins and fraternal twins is correct in regards to DNA?

Answer
A
Identical twins have different DNA, and fraternal twins have different DNA.
B
Fraternal twins share the exact same DNA, but identical twins do not.
C
Identical twins and fraternal twins share the exact same DNA.
D
Identical twins share the exact same DNA, but fraternal twins do not.

Explanation

Identical twins develop from the same fertilized egg, so they usually share nearly the same DNA. Fraternal twins develop from two different eggs fertilized by two different sperm, so they share about as much DNA as ordinary siblings, not the exact same DNA. Therefore, the correct statement is that identical twins share the exact same DNA, but fraternal twins do not.

AI-written and checked against the verified answer.

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