Question

multiple choice question
if two embryos develop but are of the opposite sex, they must be:
o identical twins
o fraternal twins
o conjoined twins

Explanation:

• Identical twins (monozygotic twins) come from a single fertilized egg that splits. They have the same genetic material and are always of the same sex.
• Conjoined twins are a type of monozygotic twins where the embryos do not fully separate during the splitting process. They are also of the same sex.
• Fraternal twins (dizygotic twins) occur when two eggs are fertilized by two different sperm. Since they come from separate eggs and sperm, they can be of opposite sexes.

Answer:

fraternal twins