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A cross between a tall plant (TT) and sh...

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'

Text Solution

Verified by Experts

The correct Answer is:
A

In F, generation, the cross between TT and tt will result into all tall plants. Thus, tallness is the dominant trait.
Whenever two traits of a character are crossed, the `F_(1)`, plants show only one of the traits. This trait is called the dominant trait. The other trait (dwarfness in this case) that does not express itself in `F_(2)`, generation is called the recessive trait.
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In a monohybrid cross between tall pea plants denoted by TT and short pea plants denoted by tt, Preeti obtained only tall plants denoted by Tt in the F1 generation. However, in F2 generation she obtained both tall and short plants. Using the above information explain the law of dominance.

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Knowledge Check

  • In a cross between a pure tall pea plant with green pod, and a pure short plant with yellow pod, how many short plants out of 16 you would expect in "F"_(2) generation?

    A
    3
    B
    9
    C
    4
    D
    1
  • If dwarf pea plant was treated with Gibberelic acid. It grew as tall as the pure tall pea plant. If this treated plant is crossed with a pure tall plant then the phenotypic ratio of is likely to be

    A
    All dwarf
    B
    50% dwarf 50% tall
    C
    75% tall 25% dwarf
    D
    All tall
  • A cross between two tall Garden Pea Plants produced all tall plants. The possible genotype of the parents are (I)TT,TT(II)TT,Tt(III)Tt,tt(IV) Tt,Tt Correct answer is

    A
    III,IV
    B
    I,IV
    C
    I,II
    D
    II,III
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