Which of the following have a 40% to 60% similarity of genetic inheritance?

Question

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Fraternal twins have a 40% to 60% similarity of genetic inheritance, as they are no more genetically alike than non-twin siblings. Identical twins, on the other hand, have nearly 100% genetic similarity as they derive from a single egg that splits into two embryos. Cousins and adopted siblings have a much lower genetic similarity as they do not share the same level of genetic inheritance.

Which of the Following Have a 40% to 60% Similarity