Question

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Parental pea plants cross fertilised and seeds collected Male parents always bore violet flowers
Female parent always had white flowers

F1 generation 330 seeds sown and observed
All 330 seeds gave violet flowers.

F2 generation Out of 44 seeds 33 seeds gave plants with violet flowers and 11 seeds gave plants with white flowers

(i)What is the term for this type of cross ?
(a) Trihybrid cross (b) Dihybrid cross sc) Monohybrid cross (d)Polyhybrid Cross

(ii) What is the conclusion drawn from the F1 generation of the above cross
(a) only the recessive character is expressed
(b) Law of dominance
(c) No conclusion can be drawn as such
(d) The cross is incomplete

(iii) What is the genotypic ratio of the F2 generation?
(a) 1:1 (b) 1:2:1 c) 3:1 (d) 9:3:3:1

(iv) What is the phenotypic ratio of the F2 generation?
(a) 9:3:3:1 (b) 1:1 (c) 3:1 d) 1:2:1

(v)The above Experiment was carrie out in __________ plants

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Answer 1

Answer:

I) c monohybrid cross

2 law of dominance

3) b

4)c

5) pea i.e pisum sativum