Question

Monozygotic twins are produced when

• A. First cleavage of zygote is followed by separation into two
  
• B. Incomplete cleavage of zygote
  
• C. Two ova are fertilized simultaneously
• D. There is no cleavage
  

Answer 1

The correct option is A First cleavage of zygote is followed by separation into two


Formation of monozygotic twins

Monozygotic twins or identical twins are produced when two offspring develop from a single fertilized ovum or zygote. At an early stage, the zygote (fertilized ovum) is separated into two independent cells that develop into offspring of the same sex with identical genetic characteristics.

Final answer:

(c) First cleavage of zygote is followed by separation into two