Which two individuals would we expect to have the greatest degree of phenotypic similarity

A)  mother and daughter 
B)  monozygotic twins 
C)  dizygotic twins 
D)  father and son

Phenotypic Similarity

The degree to which two or more organisms resemble each other in their observable characteristics, due to genetic or environmental influences.

Monozygotic Twins

Twins who are genetically identical as they are formed from one fertilized egg that splits and develops into two embryos.