When Mendel self-pollinated the tall $F_{1}$ plant he observed:

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tall, dwarf as well as plants with intermediate height in F₂ generation.

intermediate sized plant that were not identical to either of the parents in F₂ generation.

3/4th of plants in $F_{2}$ were dwarf while 1/4th of the $F_{2}$ plants were tall.

in $F_{2}$ generation some plants were dwarf and majority were tall.

answer is D.

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Detailed Solution

Mendel self-pollinated the tall $F_{1}$ plants and to his surprise found that in the $F_{2}$ generation some of the offspring were ‘dwarf ’; the character that was not seen in the $F_{1}$ generation was now expressed. The proportion of plants that were dwarf were 1/4th of the $F_{2}$ plants while 3/4th of the $F_{2}$ plants were tall. The tall and dwarf traits were identical to their parental type and did not show any blending, that is all the offspring were either tall or dwarf, none were of in between height.