Principle Of Inheritance And Variation Question 59

Question: Identical twins are produced when [BHU 1982; MP PMT 2001]

Options:

A) One fertilized egg divided into 2 blastomeres and both separate

B) One sperm fertilizes two eggs

C) One egg fertilized with two sperms

D) Two eggs are fertilized

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Answer:

Correct Answer: A

Solution:

Identical twins are formed when one sperm fertilizes one egg to form a single zygote.

They have the same genotype and phenotype and are of same sex.