Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the

Question

Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?

Professor PC Thomas Classes · Answer

(d) : Since the twins born are of different sexes, hence they are fraternal twins. This is because fraternal twins occur when two separate eggs are fertilised by two different sperms, resulting in different sexes of the newly born twins.