A tall pea plant bearing violet flowers is crossed with a tall pea plant bearing white flowers. In the f1 progeny , there were tall pea plants with white flowers, tall pea plants with violet flowers, dwarf pea plants with violet flowers and dwarf pea plants with white flowers.Work out the cross to show how is it possible.
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The condition explained is a dihybrid cross which involves two characters in a single plant. This is also called as dihybrid inheritance. The cross is done between Peaplant which is Tall with Violet flowers (TTWw) and pea plant which is short with white plants (ttww). F1 generation offspring exhibit all pea plants with tall and violet flowers. When F1offspring were self bred they give rise to 9:3:3:1 ratio of plants.
Dihybrid inheritance is the experimentation of two characteristics with their four contrasting traits.
For instance, dihybrid inheritance involves a pea plant producing tall and violet flowers (TT and WW) crossing with a plant producing short and white flowers (aa and ww).
F1 progeny produces axial and violet flowers (T and t, W and w ) in which axial and violet are dominant traits.
F2 progeny were similar to their parents and produced Tall and violet flowers, while some of them produced short and white flowers. However, some plants of the F2 progeny even showed new combinations, like tall white flowers and short violet flowers.
Dominant traits - Tall, Violet
Recessive traits - Short, White
Phenotype of the offspring - 9 Tall violet : 3 Short violet : 3 Tall white : 1 short white
Genotype of the offspring - 9 TTWW : 3 ttWW : 3 TTww : 1 ttww
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