If we cross pure-breed tall (dominant) pea plants with pure-breed dwarf (recessive) pea plants we will get pea plants of the F1 generation.
If we now self-cross the pea plant of the F1 generation, then we obtain pea plants of the F2 generation.
(a) What do the plants of the F1 generation look like?
(b) State the ratio of tall plants to dwarf plants in the F2 generation.
(c) State the type of plants not found in the F1 generation but appeared in the F2 generation, mentioning the reason for the same. (AI 2012)

(A) The F1 generation of plants will all be tall plants.
(b) The F2 generation has a 3:1 ratio of tall to dwarf plants.
(c) Dwarf plants first arose in the F2 general ion and were not present in the F1 generation. This is because only the dominant trait (tall) expresses itself in the F1 generation, while the recessive trait (dwarf) is inhibited. Due to the independent inheritance of characteristics, whether dominant or recessive, dwarf plants first developed in the F2 generation. To put it another way, a single copy of (T) is sufficient to make the plant tall, whereas both copies of (T) are required to make the plant dwarf.

Leave a Comment

Your email address will not be published. Required fields are marked *