The genotypic and phenotypic ratio in the off | vedclass

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(B) In Mendelian genetics, complete dominance typically results in a phenotypic ratio of $3:1$ and a genotypic ratio of $1:2:1$ in the $F_2$ generatio

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Incomplete dominance

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(B) In Mendelian genetics, complete dominance typically results in a phenotypic ratio of $3:1$ and a genotypic ratio of $1:2:1$ in the $F_2$ generation.However, in cases of Incomplete dominance, the dominant allele does not completely mask the recessive allele.As a result, the heterozygote shows an intermediate phenotype.For example, in $Mirabilis$ 	ext{ jalapa} (Four o'clock plant), a cross between red and white flowers produces pink flowers in the $F_1$ generation.When $F_1$ plants are self-pollinated, the $F_2$ generation shows a phenotypic ratio of $1$ (Red) $: 2$ (Pink) $: 1$ (White) and a genotypic ratio of $1 (RR) : 2 (Rr) : 1 (rr)$.Thus, both the genotypic and phenotypic ratios are identical $(1:2:1)$.

The genotypic and phenotypic ratio in the offspring is $1:2:1$. This explains the principle of:

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