NEET PG DENTAL EXAM

EMBRYOLOGY

FERTILISATION EARLY DEVELOPMENT OF EMBRYO AND IMPLANTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following twins form from the fertilisation of one sperm and one ovum?
A
Identical twins
B
Fraternal twins
C
Siamese twins
D
None of the above
Explanation: 

Detailed explanation-1: -Identical twins (also called monozygotic twins) result from the fertilization of a single egg by a single sperm, with the fertilized egg then splitting into two.

Detailed explanation-2: -Definition. Fraternal twins (also called dizygotic twins) result from the fertilization of two separate eggs with two different sperm during the same pregnancy. Fraternal twins may not have the same sex or appearance.

Detailed explanation-3: -Non-identical (dizygotic) twins happen when 2 separate eggs are fertilised and then implant into the womb (uterus). These non-identical twins are no more alike than any other 2 siblings. Non-identical twins are more common. The babies may be of the same sex or different sexes.

Detailed explanation-4: -Mo/mo is a shortened form of monochorionic monoamniotic. Mo/mo twins are those who share both the chorionic and amniotic sacs. Or to put it another way, since mono means “one, ‘’ a mo/mo pregnancy is one where there is one placenta and one amniotic sac for both babies.

There is 1 question to complete.