Among the following which ones do not show true breeding nature?A. Snap dragon plant with Pink flowers                B. Dwarf pea plantsC. People with AB blood group                          D. People with ‘O’ blood group

Heterozygous individuals are not true breeding. Snap dragon plant with pink flowers is heterozygous (Rr). People with AB blood group are always heterozygous as they have genotype as IA IB. Dwarf pea plant is recessive one and always homozygous and it is represented as tt or dd. Similarly people with O blood group as their genotype in homozygous condition as I0 I0.