Question

which statement about identical twins and fraternal twins is correct in regards to dna?
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.

please select the best answer from the choices provided

a
b
c
d

Explanation:

To determine the correct answer, we analyze the DNA relationship in twins:

• Identical twins form from a single fertilized egg that splits, so they share the exact same DNA.
• Fraternal twins form from two separate fertilized eggs, so they have different DNA (like regular siblings, just born at the same time).

Now we evaluate the options:

• Option A: Incorrect, as identical twins have the same DNA.
• Option B: Incorrect, the description is reversed (identical twins, not fraternal, share exact DNA).
• Option C: Incorrect, fraternal twins do not share exact DNA.
• Option D: Correct, as it accurately states identical twins share exact DNA and fraternal twins do not.

Answer:

D. Identical twins share the exact same DNA, but fraternal twins do not.