In Mirabilis text{ } jalapa, when homozygous | vedclass

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(B) This is an example of Incomplete Dominance. In $Mirabilis 	ext{ } jalapa$ (Four O'clock plant), the allele for red flower colour $(R)$ is incompl

Vedclass · Accepted Answer

$1 : 2 : 1$

Vedclass · Answer

(B) This is an example of Incomplete Dominance. In $Mirabilis 	ext{ } jalapa$ (Four O'clock plant), the allele for red flower colour $(R)$ is incompletely dominant over the allele for white flower colour $(r)$. When homozygous red $(RR)$ and white $(rr)$ plants are crossed, the $F_1$ generation $(Rr)$ produces pink flowers. When $F_1$ individuals $(Rr)$ are self-crossed $(Rr 	imes Rr)$, the resulting $F_2$ generation shows the following genotypes: $1 RR$ (red) : $2 Rr$ (pink) : $1 rr$ (white). Thus, the phenotypic ratio is $1 : 2 : 1$.

In $Mirabilis \text{ } jalapa$, when homozygous red-flowered and white-flowered plants are crossed, all $F_1$ plants have pink-coloured flowers. What will be the phenotypic ratio in the $F_2$ generation produced by selfing of $F_1$ individuals?

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