This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
ABO blood group inheritance is an example of 
Select and explain. 
A. A. Co dominance, B. B. Mitochondrial inheritance, C. C. Allelic exclusion, D. D. Sex linked inheritance
A: A. Co dominance
Answer: A: A. Co dominance 
Explanation: When both of the allels of a gene pair contribute to the phenotype ,this is called as Co dominance. Good examples of co dominant inheritance are; Histocompatibility Blood group antigens Refer robbins 9/140