Identical twins have ________ of their genes in common,but fraternal twins have only ________ of their genes in common,making them as genetically similar as siblings born at different times.

Question

Quizplus · Accepted Answer

Identical twins are derived from the same fertilized egg and therefore share all of their genes, making "all" the correct choice for the first blank. Fraternal twins, on the other hand, come from two different fertilized eggs and share about half of their genes, just like any other siblings, making "about half" the correct choice for the second blank.

Identical Twins Have ________ of Their Genes in Common,but Fraternal