RR (Red) Antirrhinum is crossed with white (WW) one. Offspring RW are pink. This is an example of

Explanation

The inheritance pattern observed in the cross between red (RR) and white (WW) Antirrhinum, resulting in pink (RW) offspring, is an example of incomplete dominance. In incomplete dominance, the heterozygous phenotype is an intermediate of the two homozygous phenotypes. This is evidenced by the pink color of the RW offspring, which is a blend of the red and white colors of the parents. In contrast, dominant-recessive inheritance would result in offspring displaying only the dominant phenotype. The term 'hybrid' does not specify the nature of the genetic interaction, and 'supplementary genes' refer to a different genetic interaction not demonstrated in this example.