Dizygotic twins
A) have identical genetic sequences.
B) share about half of their genes.
C) must be the same sex.
D) exhibit genetic differences from each other caused by environmental influences after fertilization.
E) always show higher concordance values than do identical twins.

Question

Quizplus · Accepted Answer

Dizygotic twins, also known as fraternal twins, develop from two separate eggs fertilized by two separate sperm. As a result, they share about 50% of their genes on average, similar to any two siblings. They can be of the same or different sex. Unlike identical twins, dizygotic twins are not genetically identical and may exhibit genetic differences from each other caused by environmental influences after fertilization. Therefore, option A and E are incorrect.

Dizygotic Twins