This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
[{'content': 'Inheritance of ABO group is ______ \nSelect and explain. \nA. X-linked inheritance, B. Recessive inheritance, C. Mitochondrial inheritance, D. Codominance', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Inheritance of ABO group is codominance. Codominance: Gene expression and mendelian traits are usually described as dominant or recessive; in some cases, both of the alleles of a gene pair contribute to the phenotype - a condition called codominance. Examples include histocompatibility and ABO blood group antigens. Classification of genetic disorders: Mendelian disorders (classic inheritance) Autosomal dominant Autosomal recessive X-linked dominant X-linked recessive Non-Mendelian disorders (Non-classic inheritance) Trinucleotide repeat mutations Fragile X syndrome Friedreich ataxia Huntington&;s disease Mutations in mitochindrial genes: MELAS, MERRF Genomic imprinting Angelman syndrome Prader-Willi syndrome Silver-Russell syndrome Gonadal mosaicism Chromosomal Disorders: Microdeletions: Cri du chat syndrome Down&;s syndrome, Turner&;s syndrome, Klinfelter&;s syndrome Ref: Robbins and cotran pathological Basis of Disease 9th edition Pgno: 140', 'role': 'assistant'}]