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06/01/2022 6:21 pm
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In a Mendelian monohybrid cross, the F2 generation shows identical genotypic and phenotypic ratios. What does it tell us about the nature of alleles involved? Justify your answer.
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06/01/2022 6:22 pm
In a monohybrid cross, starting with parents which homozygous dominant and homozygous recessive, F1, would be heterozygous for the trait and would express the dominant allele. But in case of incomplete dominance, a monohybrid cross shows the result as follows.
Phenotypic ratio → Red : Pink : White :: 1 : 2 : 1
Genotypic ratio → RR : Rr: rr : : 1: 2: 1
Here the genotypic and phenotypic ratios are the same. So, we can conclude that when genotypic and phenotypic ratios are the same, the alleles show incomplete dominance.