question_answer 20)

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

Answer:

(i) Human ovary produces only one egg in a month. (ii) As the identical twins are monozygotic and are produced from two parts of same zygote so only one egg was released from the ovary. (iii) As the fraternal twins are dizygotic and are produced from two different zygotes which is possible only if two eggs are released from the ovaries in a month.