Answer:
D. different due to independent assortment during meiosis
Step-by-step explanation:
Have you looked at how siblings (except twins) are not exactly identical? Also, Mendel's Law of Independent Assortment.
It is not A because of independent assortment.
It not B because the chromosomes get assorted
It is not C because gametes are formed in meosis not mitosis
The best answer is D