Question

Answer on the basis of paragraph given below:

If we cross- breed tall (dominant) pea plant with pure- breed

dwarf (recessive) pea plant, we will get plants of F1 generation. If

we now self-cross the pea plant of F1 generation, we obtain pea

plants of F2 generation.

(i) What do two plants of F1 generation look like?

(ii) State the ratio of tall plants to dwarf plants in F2 generation.

(iii) State the type of plants not found in F1 generation but

appeared in F2 generation.

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Answer 1

Answer:

(i) F1 generation consists of only tall pea plants as tallness is dominant trait.

(ii) In F2 generation ratio is 3:1 ------ 3 tall and 1 dwarf of every 4 cross breeds.

(iii) In F1 generation we were not able to see short pea plants as it is a recessive trait but in F2 generation once in a while the recessive traits combine with recessive trait and give small plant.