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(B) The phenomenon of incomplete dominance was observed by Carl Correns in $1903$.While working with the plant $Mirabilis$ $jalapa$ (four-o'clock plan

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(B) The phenomenon of incomplete dominance was observed by Carl Correns in $1903$.While working with the plant $Mirabilis$ $jalapa$ (four-o'clock plant),he observed that when a red-flowered variety is crossed with a white-flowered variety,the resulting $F_1$ hybrid is pink.Furthermore,the $F_2$ generation exhibits a phenotypic ratio of $1$ red : $2$ pink : $1$ white.This result demonstrates that neither allele is completely dominant over the other,hence the term incomplete dominance.

The phenomenon of incomplete dominance was observed by

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