Question

When Mendel cross-pollinated plants of two pure bred strains, all the offspring were ______ in their phenotypes.

Answer 1

When Mendel cross-pollinated plants of two pure bred strains, all the offspring were alike in their phenotypes.

Explanation:

Mendel observed that when he crossed two pure-bred strains of pea plants with contrasting traits, the first generation offspring (F₁) all showed the same phenotype, demonstrating dominance of one trait over the other. This uniformity in phenotype among the offspring formed the basis of Mendel's principle of dominance.