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In an experiment of sweet pea,a cross wa...

In an experiment of sweet pea,a cross was made between two plants ,one having purple flowers one having white. In `F_(1)` all had purple flowers and in `F_(2)` it was modified Mendelian ratio:
(i)What ratio do you expect in `F_(2)`? (ii)What is this phenomenon called? (iii)What are such genes called?

Text Solution

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(i)`F_(2)` ratio will be 9 (purple):7(white), (ii)Complementary factors, (iii)Complementary genes.
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Knowledge Check

  • When pure long plant having white flower is crossed with pure dwarf plant having red flower, the dwarf progeny in F_(2) generation is

    A
    `1//16`
    B
    `3//16`
    C
    `4//16`
    D
    `9//16`

  • If in a garden pea plant , cross is made between red flowered and white flowered plants . What will be the phenotypic ratio in F_(2) generation

    A
    `1:2:1`
    B
    `9:3:3:1`
    C
    `3:1`
    D
    `1:3`

  • A cross is made between tall pea plants having green pods and dwarf pea plants having yellow pods. In the F_(2) generation, out of 80 plants how many are likely to be tall plants?

    A
    15
    B
    20
    C
    45
    D
    60

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