Fraternal twins:
A)Are similar to non-twin siblings in that they share about 50% of their genes
B)Are produced by separately fertilized eggs
C)Have concordance rates that are lower than monozygotic twins if there is a genetic component involved
D)All of the above

Question

Quizplus · Accepted Answer

Fraternal twins are produced by separately fertilized eggs, so they share about 50% of their genes. Because they are not genetic clones of each other, their concordance rates for traits that have a genetic component tend to be lower than those of monozygotic twins. Therefore, all of the above options are correct.

Fraternal Twins