Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants- The pea plants obtained in F 1 generation are then cross-bred to produce F 2 generation of pea plants-a What do the plants of F 1 generation look like-b What is the ratio of tall plants to dwarf plants in F 2 generation-c Which type of plants were missing in F 1 generation but reappeared in F 2 generation-

(a) All plants in nbsp;F1 generation will be tall. (b) In F2 generation, the ratio of tall plants to dwarf plants will be 3:1. (c) Dwarf pea plants were missi ...

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Standard X

Biology

Laws of Mendel

Pure-bred tal...

Question

Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F₁ generation are then cross-bred to produce F₂ generation of pea plants.
(a) What do the plants of F₁ generation look like?
(b) What is the ratio of tall plants to dwarf plants in F₂ generation?
(c) Which type of plants were missing in F₁ generation but reappeared in F₂ generation?

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Solution

(a) All plants in F₁ generation will be tall.
(b) In F₂ generation, the ratio of tall plants to dwarf plants will be 3:1.
(c) Dwarf pea plants were missing in F₁ generation, but reappeared in F₂ generation.

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Q. Pure-bred pea plants A are crossed with pure-bred pea plants B. It is found that the plants which look like A do not appear in F₁ generation but re-emerge in F₂ generation. Which of the plants A and B are : (i) tall, and (ii) dwarf? Give reason for your answer.

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(a) All plants in F1 generation will be tall. (b) In F2 generation, the ratio of tall plants to dwarf plants will be 3:1. (c) Dwarf pea plants were missing in F1 generation, but reappeared in F2 generation.

(a) All plants in F₁ generation will be tall.
(b) In F₂ generation, the ratio of tall plants to dwarf plants will be 3:1.
(c) Dwarf pea plants were missing in F₁ generation, but reappeared in F₂ generation.