Identify the true statement about dizygotic fraternal twins.
A) they are genetically nonidentical
B) they are formed when one oocyte is fertilized by two sperms
C) they are phenotypically identical
D) they are always of the same sex
E) they are generally conjoined twins

Question

Quizplus · Accepted Answer

Dizygotic or fraternal twins are formed when two separate oocytes are fertilized by two separate sperms. This results in two genetically distinct individuals who may or may not resemble each other, and can be of the same or different sexes. Therefore, option A is the true statement about dizygotic fraternal twins. Option B is incorrect because one oocyte can only be fertilized by one sperm, and option C is incorrect because dizygotic twins are not identical. Option D is also incorrect because dizygotic twins can be of the same or different sexes, and option E is incorrect because dizygotic twins are separate individuals and not conjoined.

Identify the True Statement About Dizygotic Fraternal Twins