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Question

Genotypic and phenotypic ratio is 1:2:1 in the offsprings explains the principle of

A
Dominance
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B
Blending inheritance
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C
Recessiveness
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D
All of the above
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Solution

The correct option is B Blending inheritance
Genotypic and phenotypic ratio is 1:2:1 in the offspring explains the principle of blending inheritance. During the 19th century, prior to the discovery of genetics, blending inheritance was merely a widespread hypothetical model, rather than a formalized scientific theory, in which it was thought inherited traits were determined randomly, from a range bound by the homologous traits found in the parents. The height of a person, with one short parent and one tall parents, was thought to always be of some interim value between its two parents' heights. The shortcoming of this idea was in how it required the person of interim height, in turn, to then become one of the limiting bounds for future offspring and so on down the entire lineage.

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