Which of the following is a major cause of the dramatic rise in fraternal twinning in industrialized nations?
A) temperature changes
B) older maternal age
C) late fertilization of the ovum
D) variation in oxygen levels

Question

Quizplus · Accepted Answer

Older maternal age is a major cause of the dramatic rise in fraternal twinning in industrialized nations. As women delay having children, the likelihood of releasing multiple eggs during ovulation increases, leading to a higher incidence of fraternal twinning. Temperature changes, late fertilization of the ovum, and variation in oxygen levels are not major causes of the rise in fraternal twinning.

Which of the Following Is a Major Cause of the Dramatic