Final answer:
The statement is False. According to Mendel's principles, when two heterozygous plants are crossed, the F1 offspring will all show the dominant trait. However, in the F2 generation, the phenotypic ratio will be approximately three dominant traits to one recessive trait.
Step-by-step explanation:
The statement is False. According to Mendel's principles, when two heterozygous plants (P generation) are crossed, the resulting F1 offspring will all show the dominant trait (phenotype). However, when these F1 offspring are self-crossed, the resulting F2 generation will exhibit a phenotypic ratio of approximately three dominant traits to one recessive trait. Therefore, the correct ratio is 3/4 of the offspring showing the dominant trait, not 2/4.