A woman has given birth to fraternal twin daughters. How many ovum/ova would have been released by the ovary?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Two
Fraternal twins develop from two separate ova, each fertilised by a different sperm, so they need not look alike. Identical twins, by contrast, come from one zygote that splits into two.
One ovum + one sperm = one zygote.
Two fraternal babies = two zygotes = two ova.
Note: This question is from the NCERT exercises: Chapter 2, Human Reproduction, Question 20.
NCERT Extract:
Parturition and Lactation – …
