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In a plant tallenss is dominant over dwa...

In a plant tallenss is dominant over dwarfness and red flower is dominant over white. Starting with the parents work out a dihybrid cross. What is standard dihybrid ratio? Do you think the values would deviate if the two genes in question are interacting wiht each other?

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Refer topic Dihybrid cross of Mendel i.e. .Law of independent assortment. for `9:3:3:1` ratio
Values will deviate if genes interacted with each other e.g. ratio may come 9:7,9:3:4,15:1,13:3 etc.
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Knowledge Check

  • In a plant , tallness is dominant over dwarfness and red flowers are incompletely dominant over white flowers, the hybrid being pink. How many offsprings will be of tall height with pink flowers from a cross involved two plants each of which is hybrid tall and has pink flowers ?

    A
    `4/16`
    B
    `6/16`
    C
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    D
    `2/16`

  • In Mirabilis plant, tallness is completely dominant over dwarfness, while red flower exhibit incomplete dominance over white flower. If tall and pink flowered plant, on selfing shows 1:2:1 phenotypic ratio then what would be genotype of the plants?

    A
    TRr
    B
    TTRR
    C
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    D
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    A
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    B
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    C
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    D
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