Q.

Which of the following pairs is wrongly matched               [2018]

1 Starch synthesis in pea : Multiple alleles  
2 ABO blood grouping : Co-dominance  
3 XO type sex determination : Grasshopper  
4 T.H. Morgan : Linkage  

Ans.

(1)

The gene for starch synthesis in pea seeds can produce more than one effect which implies it is a pleiotropic gene.