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If we cross-bred tall (dominant) pea plant with pure bred dwarf (recessive) pea plant,

Monjur Alahi

If we cross-bred tall (dominant) pea plant with pure bred 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 the 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. Write the reason for the same.


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1 Answers

Salim Ahmed Kawsar

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(i) Tall
(ii) 3:1
(iii) Dwarf
Reason: Being a recessive trait, dwarfness can only be expressed in the absence of dominant trait/ in its pure form.

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A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because

(a) tallness is the dominant trait

1 Answers 1 views
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY) the seeds produced in F1 generation are

(a) round and yellow

1 Answers 1 views
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is

(c) 1 : 1, is the correct option.

1 Answers 1 views
Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive

(a) yellow — dominant green — recessive (b) round — dominant wrinkled — recessive

1 Answers 1 views
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers.

(c) The genetic make-up of the tall parent can be depicted as TtWW Since all the progeny bore violet flowers, it means that the tall plant having violet flowers has...

1 Answers 2 views
In order to obtain the F1 generation, Mendel pollinated a true-breeding, say, tall plant with a true-breeding dwarf plant.

Genotype of 50% of the offspring would resemble one parent and the rest the other parent. All the F1 offsprings of the cross are heterozygous so allowing self pollination is sufficient to...

1 Answers 1 views
Which of the following traits are recessive in pea plant? Dwarfness, violet flower, wrinkled seed

Drwafness and wrinkled seeds are the recessive characters.

1 Answers 1 views
Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive...

(i) yellow- dominant     green- recessive (ii) round- dominant      wrinkled- recessive

1 Answers 1 views
In one of his experiments with pea plants Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant,

(a) The dwarf traits of the plants is not expressed in the presence of the dominant tall trait. (b) In the F2 generation, both the tall and dwarf traits are present in...

1 Answers 1 views
A Across between two tall plants resulted in offspring having few dwarf plants.

b. The genotypes of both the parents Tt and Tt.

1 Answers 1 views

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