Question

In his classical monohybrid cross, Mendel took two pure line homozygous variant plants for stem height and cross-pollinated them. Which of the following statements give a correct description of his observations?

• A. Dwarf variant was completely wiped out in both $F_1\mathrm{and}{F}_2$ generations
• B. Total domination of the tall variant in both $F_1\mathrm{and}{F}_2$ generations
• C. Tall variant was completely wiped out in both $F_1\mathrm{and}{F}_2$ generations
• D. The disappearance of the dwarf variant in the $F_1$ and its reappearance in the $F_2$ generation

Answer 1

The correct option is D The disappearance of the dwarf variant in the $F_1$ and its reappearance in the $F_2$ generation

When Mendel crossed the two pure line homozygous plants, the recessive trait did not express itself in the$F_1$ generation.

However, in the $F_2$ generation, the pure homozygous recessive tt appeared once again.