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In a cross between a tall pea plant (TT)...

In a cross between a tall pea plant (TT) and a short pea plant (tt), what will be the characteristics shown by the `F_(1)` generation?

Text Solution

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All the plants would be tall plants (Tt).
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In a monohybrid cross between tall pea plants (TT) and short pea plants (tt) a scientist obtained only tall pea plants (Tt) in the F_(1) generation. However, on selfing the F_(1) generation pea plants, he obtained both tall and short plants in F_(2) generation. On the basis of above observations with other angiosperms also, can the scientist arrive at a law? If yes, explain the law. If not, give justification for your answer.

(a) Mendel crossed tall pea plants with dwarf pea plants in his experiment. Write his observations giving reason on the F_(1) and F_(2) generations. (b) List any two contrasting characters other than height that Mendel used in his experiments in pea plants.

Knowledge Check

  • 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
    B
    Shortness is the dominant trait
    C
    Tallness is the recessive trait
    D
    Height of pea plant is not governed by gene 'T' or 't

  • 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
    B
    shortness is the dominant trait
    C
    tallness is the recessive trait
    D
    height of pea plant is not governedb by gene 'T' and 't'

  • 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
    B
    Shortness is the dominant trait
    C
    Tallness is the recessive trait
    D
    Height of pea plant is not governed by gene 'T' or 't

    • Similar Questions

    Explore conceptually related problems

    (i) Why are two letters (such as TT, Tt, tt) used to denote the character of height? (ii) If a purple pea plant (PP) is crossed with a white coloured pea plant (pp), will we have white flowered pea plant in the F, generation? Why? (iii) Define dominant and recessive traits.

    Why, in a test cross, did Mendel cross a tall pea plant with a dwarf pea plant only?

    A cross was carricd out between a pure bred tall pea plant and a pure bred dwarf pea plant and F_(1) progeny was obtained. Later, the F_(1) progeny was selfed to obtain F_(2) progeny. Answer the following questions : (i) What is the phenotype of the F, progeny and why? (ii) Give the phenotypic ratio of the F_(2) progeny. (iii) Why is the F_(2) progeny different from the F_(1) progeny?

    With the help of a cross done with garden pea plants, trace the work done by Mendel with a tall and a short plant to arrive at a 3:1 ratio in the F_(2) generation.

    In peas, a pure tall plant (TT) is crossed with a short plant(tt). The ratio of pure tall plants to short plants in F_(2) is

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