Class 12 Biology Inheritance Variation INHERITANCE OF TWO GENES (DIHYBRID CROSS)


Mendel also worked with two characters on pea plant. He chose color and shape of the seed to explain the inheritance of two genes.

Y – dominant yellow color

y – recessive green color

R – round shape of the seed

r – wrinkled shape of the seed


Phenotypic Ratio:

Round yellow : round green : wrinkled yellow : wrinkled green

        9               :           3          :             3                :           1

Pic shows Dihybrid cross.

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