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Mention the advantages of selecting pea ...

Mention the advantages of selecting pea plant for experiment by Mendel.

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Mendel.s selected garden pea plant as a sample due to the following reasons: (i) Pea plants are readily available on large scale and has bisexual cleistogamous flowers. (ii) Pea are self-pollinated and can be cross-pollinated also. (iii) These are annual plants with short life cycle. So generation can be studied within a short period. (iv) Pea plants could be easily raised, maintained and handled. (v) Pea plants differ in distinct/ contrasting characteristics which provide many easily detectable contrasting characters.
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Knowledge Check

  • When hybridisation is carried out between a tall (TT) pea plant and a short (tt) pea plant, all the plants (offsprings) show the expression of tallness, because ………………….... a.the expression of tallness is dominant. b.the expression of short is dominant. c.the expression of tallness is recessive. d.the character of tallness in pea plant is not controlled by gene T or t.

    A
    the expression of tallness is dominant.
    B
    the expression of short is dominant.
    C
    the expression of tallness is recessive.
    D
    the character of tallness in pea plant is not controlled by gene T or t.

  • What is the ratio for test cross in dihybrid experiment of Mendel?

    A
    `9 : 3 : 3 : 1`
    B
    `1 : 1 : 1 : 1`
    C
    `7 : 1 : 1 : 7`
    D
    `11 : 1 : 1 : 3`

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    Both the types of pea plants, used as parent generation by Mendel in his experiments, were pure breeds in the expression of their characters.

    In peas, tallness is dominant over dwarfness and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny in numbers mentioned against them : Tall, Red =138, Tall, White = 132 Dwarf, Red =136, Dwarf, White = 128 Mention the genotypes of the two parents and of the four offspring types.

    The gene ‘T’ for the character of tallness in pea plant is dominant and gene ‘t’ is recessive. Explain it on the basis of Mendel’s experiment.

    Explain the independent inheritance of two separate characters in pea plant on the basis of Mendel's experiment.

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