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State the Mendelian principle which can ...

State the Mendelian principle which can be derived from a dihybrid cross and not from monohybrid cross.

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In the dihybrid cross the phenotype round yellow, wrinked round green and wrinkled green appeared in the `9 : 3 : 3 : 1` ratio.
From the dihybrid cross 'law of independent assortment' can be derived which states that when two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pairs of characters.
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(a) A garden pea plant bearing terminal, violet flowers, when crossed with another pea plant bearing axial, violet flowers, produced axial, violet flowers and axial, white flowers in the ratio of 3 : 1. Work out the cross showing the genotypes of the parent pea plants and their progeny. (b) Name and state the law that can be derived from this cross and not from a monohybrid cross.

Dihybrid cross is related to

Dihybrid test cross ratio is

Genotypic ratio of a dihybrid cross is

Monohybrid test cross is

Genotypic ratio of a monohybrid cross is

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