<prompt> A2 concentration in thalassemia trait is ?11-2.52.5-3.53 .5  <response>: Ans. is d i.e., 3.5 T. Major Intermedia T. Minor J Genetics Homozygous Double Heterozygot es heterozygotes Hb F 30-90 20-100 0-5 HbA2 3.5 3.5 3.6 -8 